﻿/*
 Leaflet, a JavaScript library for mobile-friendly interactive maps. http://leafletjs.com
 (c) 2010-2013, Vladimir Agafonkin
 (c) 2010-2011, CloudMade
*/
(function (window, document, undefined) {
    var oldL = window.L,
        L = {};

    L.version = '0.7.3';

    // define Leaflet for Node module pattern loaders, including Browserify
    if (typeof module === 'object' && typeof module.exports === 'object') {
        module.exports = L;

        // define Leaflet as an AMD module
    } else if (typeof define === 'function' && define.amd) {
        define(L);
    }

    // define Leaflet as a global L variable, saving the original L to restore later if needed

    L.noConflict = function () {
        window.L = oldL;
        return this;
    };

    window.L = L;

    /*
     * L.Util contains various utility functions used throughout Leaflet code.
     */

    L.Util = {
        extend: function (dest) { // (Object[, Object, ...]) ->
            var sources = Array.prototype.slice.call(arguments, 1),
                i, j, len, src;

            for (j = 0, len = sources.length; j < len; j++) {
                src = sources[j] || {};
                for (i in src) {
                    if (src.hasOwnProperty(i)) {
                        dest[i] = src[i];
                    }
                }
            }
            return dest;
        },

        bind: function (fn, obj) { // (Function, Object) -> Function
            var args = arguments.length > 2 ? Array.prototype.slice.call(arguments, 2) : null;
            return function () {
                return fn.apply(obj, args || arguments);
            };
        },

        stamp: (function () {
            var lastId = 0,
                key = '_leaflet_id';
            return function (obj) {
                obj[key] = obj[key] || ++lastId;
                return obj[key];
            };
        }()),

        invokeEach: function (obj, method, context) {
            var i, args;

            if (typeof obj === 'object') {
                args = Array.prototype.slice.call(arguments, 3);

                for (i in obj) {
                    method.apply(context, [i, obj[i]].concat(args));
                }
                return true;
            }

            return false;
        },

        limitExecByInterval: function (fn, time, context) {
            var lock, execOnUnlock;

            return function wrapperFn() {
                var args = arguments;

                if (lock) {
                    execOnUnlock = true;
                    return;
                }

                lock = true;

                setTimeout(function () {
                    lock = false;

                    if (execOnUnlock) {
                        wrapperFn.apply(context, args);
                        execOnUnlock = false;
                    }
                }, time);

                fn.apply(context, args);
            };
        },

        falseFn: function () {
            return false;
        },

        formatNum: function (num, digits) {
            var pow = Math.pow(10, digits || 5);
            return Math.round(num * pow) / pow;
        },

        trim: function (str) {
            return str.trim ? str.trim() : str.replace(/^\s+|\s+$/g, '');
        },

        splitWords: function (str) {
            return L.Util.trim(str).split(/\s+/);
        },

        setOptions: function (obj, options) {
            obj.options = L.extend({}, obj.options, options);
            return obj.options;
        },

        getParamString: function (obj, existingUrl, uppercase) {
            var params = [];
            for (var i in obj) {
                params.push(encodeURIComponent(uppercase ? i.toUpperCase() : i) + '=' + encodeURIComponent(obj[i]));
            }
            return ((!existingUrl || existingUrl.indexOf('?') === -1) ? '?' : '&') + params.join('&');
        },
        template: function (str, data) {
            return str.replace(/\{ *([\w_]+) *\}/g, function (str, key) {
                var value = data[key];
                if (value === undefined) {
                    throw new Error('No value provided for variable ' + str);
                } else if (typeof value === 'function') {
                    value = value(data);
                }
                return value;
            });
        },

        isArray: Array.isArray || function (obj) {
            return (Object.prototype.toString.call(obj) === '[object Array]');
        },

        emptyImageUrl: ''
    };

    (function () {

        // inspired by http://paulirish.com/2011/requestanimationframe-for-smart-animating/

        function getPrefixed(name) {
            var i, fn,
                prefixes = ['webkit', 'moz', 'o', 'ms'];

            for (i = 0; i < prefixes.length && !fn; i++) {
                fn = window[prefixes[i] + name];
            }

            return fn;
        }

        var lastTime = 0;

        function timeoutDefer(fn) {
            var time = +new Date(),
                timeToCall = Math.max(0, 16 - (time - lastTime));

            lastTime = time + timeToCall;
            return window.setTimeout(fn, timeToCall);
        }

        var requestFn = window.requestAnimationFrame ||
                getPrefixed('RequestAnimationFrame') || timeoutDefer;

        var cancelFn = window.cancelAnimationFrame ||
                getPrefixed('CancelAnimationFrame') ||
                getPrefixed('CancelRequestAnimationFrame') ||
                function (id) { window.clearTimeout(id); };


        L.Util.requestAnimFrame = function (fn, context, immediate, element) {
            fn = L.bind(fn, context);

            if (immediate && requestFn === timeoutDefer) {
                fn();
            } else {
                return requestFn.call(window, fn, element);
            }
        };

        L.Util.cancelAnimFrame = function (id) {
            if (id) {
                cancelFn.call(window, id);
            }
        };

    }());

    // shortcuts for most used utility functions
    L.extend = L.Util.extend;
    L.bind = L.Util.bind;
    L.stamp = L.Util.stamp;
    L.setOptions = L.Util.setOptions;


    /*
     * L.Class powers the OOP facilities of the library.
     * Thanks to John Resig and Dean Edwards for inspiration!
     */

    L.Class = function () { };

    L.Class.extend = function (props) {

        // extended class with the new prototype
        var NewClass = function () {

            // call the constructor
            if (this.initialize) {
                this.initialize.apply(this, arguments);
            }

            // call all constructor hooks
            if (this._initHooks) {
                this.callInitHooks();
            }
        };

        // instantiate class without calling constructor
        var F = function () { };
        F.prototype = this.prototype;

        var proto = new F();
        proto.constructor = NewClass;

        NewClass.prototype = proto;

        //inherit parent's statics
        for (var i in this) {
            if (this.hasOwnProperty(i) && i !== 'prototype') {
                NewClass[i] = this[i];
            }
        }

        // mix static properties into the class
        if (props.statics) {
            L.extend(NewClass, props.statics);
            delete props.statics;
        }

        // mix includes into the prototype
        if (props.includes) {
            L.Util.extend.apply(null, [proto].concat(props.includes));
            delete props.includes;
        }

        // merge options
        if (props.options && proto.options) {
            props.options = L.extend({}, proto.options, props.options);
        }

        // mix given properties into the prototype
        L.extend(proto, props);

        proto._initHooks = [];

        var parent = this;
        // jshint camelcase: false
        NewClass.__super__ = parent.prototype;

        // add method for calling all hooks
        proto.callInitHooks = function () {

            if (this._initHooksCalled) { return; }

            if (parent.prototype.callInitHooks) {
                parent.prototype.callInitHooks.call(this);
            }

            this._initHooksCalled = true;

            for (var i = 0, len = proto._initHooks.length; i < len; i++) {
                proto._initHooks[i].call(this);
            }
        };

        return NewClass;
    };


    // method for adding properties to prototype
    L.Class.include = function (props) {
        L.extend(this.prototype, props);
    };

    // merge new default options to the Class
    L.Class.mergeOptions = function (options) {
        L.extend(this.prototype.options, options);
    };

    // add a constructor hook
    L.Class.addInitHook = function (fn) { // (Function) || (String, args...)
        var args = Array.prototype.slice.call(arguments, 1);

        var init = typeof fn === 'function' ? fn : function () {
            this[fn].apply(this, args);
        };

        this.prototype._initHooks = this.prototype._initHooks || [];
        this.prototype._initHooks.push(init);
    };


    /*
     * L.Mixin.Events is used to add custom events functionality to Leaflet classes.
     */

    var eventsKey = '_leaflet_events';

    L.Mixin = {};

    L.Mixin.Events = {

        addEventListener: function (types, fn, context) { // (String, Function[, Object]) or (Object[, Object])

            // types can be a map of types/handlers
            if (L.Util.invokeEach(types, this.addEventListener, this, fn, context)) { return this; }

            var events = this[eventsKey] = this[eventsKey] || {},
                contextId = context && context !== this && L.stamp(context),
                i, len, event, type, indexKey, indexLenKey, typeIndex;

            // types can be a string of space-separated words
            types = L.Util.splitWords(types);

            for (i = 0, len = types.length; i < len; i++) {
                event = {
                    action: fn,
                    context: context || this
                };
                type = types[i];

                if (contextId) {
                    // store listeners of a particular context in a separate hash (if it has an id)
                    // gives a major performance boost when removing thousands of map layers

                    indexKey = type + '_idx';
                    indexLenKey = indexKey + '_len';

                    typeIndex = events[indexKey] = events[indexKey] || {};

                    if (!typeIndex[contextId]) {
                        typeIndex[contextId] = [];

                        // keep track of the number of keys in the index to quickly check if it's empty
                        events[indexLenKey] = (events[indexLenKey] || 0) + 1;
                    }

                    typeIndex[contextId].push(event);


                } else {
                    events[type] = events[type] || [];
                    events[type].push(event);
                }
            }

            return this;
        },

        hasEventListeners: function (type) { // (String) -> Boolean
            var events = this[eventsKey];
            return !!events && ((type in events && events[type].length > 0) ||
                                (type + '_idx' in events && events[type + '_idx_len'] > 0));
        },

        removeEventListener: function (types, fn, context) { // ([String, Function, Object]) or (Object[, Object])

            if (!this[eventsKey]) {
                return this;
            }

            if (!types) {
                return this.clearAllEventListeners();
            }

            if (L.Util.invokeEach(types, this.removeEventListener, this, fn, context)) { return this; }

            var events = this[eventsKey],
                contextId = context && context !== this && L.stamp(context),
                i, len, type, listeners, j, indexKey, indexLenKey, typeIndex, removed;

            types = L.Util.splitWords(types);

            for (i = 0, len = types.length; i < len; i++) {
                type = types[i];
                indexKey = type + '_idx';
                indexLenKey = indexKey + '_len';

                typeIndex = events[indexKey];

                if (!fn) {
                    // clear all listeners for a type if function isn't specified
                    delete events[type];
                    delete events[indexKey];
                    delete events[indexLenKey];

                } else {
                    listeners = contextId && typeIndex ? typeIndex[contextId] : events[type];

                    if (listeners) {
                        for (j = listeners.length - 1; j >= 0; j--) {
                            if ((listeners[j].action === fn) && (!context || (listeners[j].context === context))) {
                                removed = listeners.splice(j, 1);
                                // set the old action to a no-op, because it is possible
                                // that the listener is being iterated over as part of a dispatch
                                removed[0].action = L.Util.falseFn;
                            }
                        }

                        if (context && typeIndex && (listeners.length === 0)) {
                            delete typeIndex[contextId];
                            events[indexLenKey]--;
                        }
                    }
                }
            }

            return this;
        },

        clearAllEventListeners: function () {
            delete this[eventsKey];
            return this;
        },

        fireEvent: function (type, data) { // (String[, Object])
            if (!this.hasEventListeners(type)) {
                return this;
            }

            var event = L.Util.extend({}, data, { type: type, target: this });

            var events = this[eventsKey],
                listeners, i, len, typeIndex, contextId;

            if (events[type]) {
                // make sure adding/removing listeners inside other listeners won't cause infinite loop
                listeners = events[type].slice();

                for (i = 0, len = listeners.length; i < len; i++) {
                    listeners[i].action.call(listeners[i].context, event);
                }
            }

            // fire event for the context-indexed listeners as well
            typeIndex = events[type + '_idx'];

            for (contextId in typeIndex) {
                listeners = typeIndex[contextId].slice();

                if (listeners) {
                    for (i = 0, len = listeners.length; i < len; i++) {
                        listeners[i].action.call(listeners[i].context, event);
                    }
                }
            }

            return this;
        },

        addOneTimeEventListener: function (types, fn, context) {

            if (L.Util.invokeEach(types, this.addOneTimeEventListener, this, fn, context)) { return this; }

            var handler = L.bind(function () {
                this
                    .removeEventListener(types, fn, context)
                    .removeEventListener(types, handler, context);
            }, this);

            return this
                .addEventListener(types, fn, context)
                .addEventListener(types, handler, context);
        }
    };

    L.Mixin.Events.on = L.Mixin.Events.addEventListener;
    L.Mixin.Events.off = L.Mixin.Events.removeEventListener;
    L.Mixin.Events.once = L.Mixin.Events.addOneTimeEventListener;
    L.Mixin.Events.fire = L.Mixin.Events.fireEvent;


    /*
     * L.Browser handles different browser and feature detections for internal Leaflet use.
     */

    (function () {

        var ie = 'ActiveXObject' in window,
            ielt9 = ie && !document.addEventListener,

            // terrible browser detection to work around Safari / iOS / Android browser bugs
            ua = navigator.userAgent.toLowerCase(),
            webkit = ua.indexOf('webkit') !== -1,
            chrome = ua.indexOf('chrome') !== -1,
            phantomjs = ua.indexOf('phantom') !== -1,
            android = ua.indexOf('android') !== -1,
            android23 = ua.search('android [23]') !== -1,
            gecko = ua.indexOf('gecko') !== -1,

            mobile = typeof orientation !== undefined + '',
            msPointer = window.navigator && window.navigator.msPointerEnabled &&
                      window.navigator.msMaxTouchPoints && !window.PointerEvent,
            pointer = (window.PointerEvent && window.navigator.pointerEnabled && window.navigator.maxTouchPoints) ||
                      msPointer,
            retina = ('devicePixelRatio' in window && window.devicePixelRatio > 1) ||
                     ('matchMedia' in window && window.matchMedia('(min-resolution:144dpi)') &&
                      window.matchMedia('(min-resolution:144dpi)').matches),

            doc = document.documentElement,
            ie3d = ie && ('transition' in doc.style),
            webkit3d = ('WebKitCSSMatrix' in window) && ('m11' in new window.WebKitCSSMatrix()) && !android23,
            gecko3d = 'MozPerspective' in doc.style,
            opera3d = 'OTransition' in doc.style,
            any3d = !window.L_DISABLE_3D && (ie3d || webkit3d || gecko3d || opera3d) && !phantomjs;


        // PhantomJS has 'ontouchstart' in document.documentElement, but doesn't actually support touch.
        // https://github.com/Leaflet/Leaflet/pull/1434#issuecomment-13843151

        var touch = !window.L_NO_TOUCH && !phantomjs && (function () {

            var startName = 'ontouchstart';

            // IE10+ (We simulate these into touch* events in L.DomEvent and L.DomEvent.Pointer) or WebKit, etc.
            if (pointer || (startName in doc)) {
                return true;
            }

            // Firefox/Gecko
            var div = document.createElement('div'),
                supported = false;

            if (!div.setAttribute) {
                return false;
            }
            div.setAttribute(startName, 'return;');

            if (typeof div[startName] === 'function') {
                supported = true;
            }

            div.removeAttribute(startName);
            div = null;

            return supported;
        }());


        L.Browser = {
            ie: ie,
            ielt9: ielt9,
            webkit: webkit,
            gecko: gecko && !webkit && !window.opera && !ie,

            android: android,
            android23: android23,

            chrome: chrome,

            ie3d: ie3d,
            webkit3d: webkit3d,
            gecko3d: gecko3d,
            opera3d: opera3d,
            any3d: any3d,

            mobile: mobile,
            mobileWebkit: mobile && webkit,
            mobileWebkit3d: mobile && webkit3d,
            mobileOpera: mobile && window.opera,

            touch: touch,
            msPointer: msPointer,
            pointer: pointer,

            retina: retina
        };

    }());


    /*
     * L.Point represents a point with x and y coordinates.
     */

    L.Point = function (/*Number*/ x, /*Number*/ y, /*Boolean*/ round) {
        this.x = (round ? Math.round(x) : x);
        this.y = (round ? Math.round(y) : y);
    };

    L.Point.prototype = {

        clone: function () {
            return new L.Point(this.x, this.y);
        },

        // non-destructive, returns a new point
        add: function (point) {
            return this.clone()._add(L.point(point));
        },

        // destructive, used directly for performance in situations where it's safe to modify existing point
        _add: function (point) {
            this.x += point.x;
            this.y += point.y;
            return this;
        },

        subtract: function (point) {
            return this.clone()._subtract(L.point(point));
        },

        _subtract: function (point) {
            this.x -= point.x;
            this.y -= point.y;
            return this;
        },

        divideBy: function (num) {
            return this.clone()._divideBy(num);
        },

        _divideBy: function (num) {
            this.x /= num;
            this.y /= num;
            return this;
        },

        multiplyBy: function (num) {
            return this.clone()._multiplyBy(num);
        },

        _multiplyBy: function (num) {
            this.x *= num;
            this.y *= num;
            return this;
        },

        round: function () {
            return this.clone()._round();
        },

        _round: function () {
            this.x = Math.round(this.x);
            this.y = Math.round(this.y);
            return this;
        },

        floor: function () {
            return this.clone()._floor();
        },

        _floor: function () {
            this.x = Math.floor(this.x);
            this.y = Math.floor(this.y);
            return this;
        },

        distanceTo: function (point) {
            point = L.point(point);

            var x = point.x - this.x,
                y = point.y - this.y;

            return Math.sqrt(x * x + y * y);
        },

        equals: function (point) {
            point = L.point(point);

            return point.x === this.x &&
                   point.y === this.y;
        },

        contains: function (point) {
            point = L.point(point);

            return Math.abs(point.x) <= Math.abs(this.x) &&
                   Math.abs(point.y) <= Math.abs(this.y);
        },

        toString: function () {
            return 'Point(' +
                    L.Util.formatNum(this.x) + ', ' +
                    L.Util.formatNum(this.y) + ')';
        },

        toGeoJSON: function () {
            return L.GeoJSON.getFeature(this, {
                type: 'Point',
                coordinates: L.GeoJSON.latLngToCoords({ lng: this.x, lat: this.y })
            });
        }
    };

    L.point = function (x, y, round) {
        if (x instanceof L.Point) {
            return x;
        }
        if (L.Util.isArray(x)) {
            return new L.Point(x[0], x[1]);
        }
        if (x === undefined || x === null) {
            return x;
        }
        return new L.Point(x, y, round);
    };


    /*
     * L.Bounds represents a rectangular area on the screen in pixel coordinates.
     */

    L.Bounds = function (a, b) { //(Point, Point) or Point[]
        if (!a) { return; }

        var points = b ? [a, b] : a;

        for (var i = 0, len = points.length; i < len; i++) {
            this.extend(points[i]);
        }
    };

    L.Bounds.prototype = {
        // extend the bounds to contain the given point
        extend: function (point) { // (Point)
            point = L.point(point);

            if (!this.min && !this.max) {
                this.min = point.clone();
                this.max = point.clone();
            } else {
                this.min.x = Math.min(point.x, this.min.x);
                this.max.x = Math.max(point.x, this.max.x);
                this.min.y = Math.min(point.y, this.min.y);
                this.max.y = Math.max(point.y, this.max.y);
            }
            return this;
        },

        getCenter: function (round) { // (Boolean) -> Point
            return new L.Point(
                    (this.min.x + this.max.x) / 2,
                    (this.min.y + this.max.y) / 2, round);
        },

        getBottomLeft: function () { // -> Point
            return new L.Point(this.min.x, this.max.y);
        },

        getTopRight: function () { // -> Point
            return new L.Point(this.max.x, this.min.y);
        },

        getSize: function () {
            return this.max.subtract(this.min);
        },

        contains: function (obj) { // (Bounds) or (Point) -> Boolean
            var min, max;

            if (typeof obj[0] === 'number' || obj instanceof L.Point) {
                obj = L.point(obj);
            } else {
                obj = L.bounds(obj);
            }

            if (obj instanceof L.Bounds) {
                min = obj.min;
                max = obj.max;
            } else {
                min = max = obj;
            }

            return (min.x >= this.min.x) &&
                   (max.x <= this.max.x) &&
                   (min.y >= this.min.y) &&
                   (max.y <= this.max.y);
        },

        intersects: function (bounds) { // (Bounds) -> Boolean
            bounds = L.bounds(bounds);

            var min = this.min,
                max = this.max,
                min2 = bounds.min,
                max2 = bounds.max,
                xIntersects = (max2.x >= min.x) && (min2.x <= max.x),
                yIntersects = (max2.y >= min.y) && (min2.y <= max.y);

            return xIntersects && yIntersects;
        },

        isValid: function () {
            return !!(this.min && this.max);
        }
    };

    L.bounds = function (a, b) { // (Bounds) or (Point, Point) or (Point[])
        if (!a || a instanceof L.Bounds) {
            return a;
        }
        return new L.Bounds(a, b);
    };


    /*
     * L.Transformation is an utility class to perform simple point transformations through a 2d-matrix.
     */

    L.Transformation = function (a, b, c, d) {
        this._a = a;
        this._b = b;
        this._c = c;
        this._d = d;
    };

    L.Transformation.prototype = {
        transform: function (point, scale) { // (Point, Number) -> Point
            return this._transform(point.clone(), scale);
        },

        // destructive transform (faster)
        _transform: function (point, scale) {
            scale = scale || 1;
            point.x = scale * (this._a * point.x + this._b);
            point.y = scale * (this._c * point.y + this._d);
            return point;
        },

        untransform: function (point, scale) {
            scale = scale || 1;
            return new L.Point(
                    (point.x / scale - this._b) / this._a,
                    (point.y / scale - this._d) / this._c);
        }
    };


    /*
     * L.DomUtil contains various utility functions for working with DOM.
     */

    L.DomUtil = {
        get: function (id) {
            return (typeof id === 'string' ? document.getElementById(id) : id);
        },

        getStyle: function (el, style) {

            var value = el.style[style];

            if (!value && el.currentStyle) {
                value = el.currentStyle[style];
            }

            if ((!value || value === 'auto') && document.defaultView) {
                var css = document.defaultView.getComputedStyle(el, null);
                value = css ? css[style] : null;
            }

            return value === 'auto' ? null : value;
        },

        getViewportOffset: function (element) {

            var top = 0,
                left = 0,
                el = element,
                docBody = document.body,
                docEl = document.documentElement,
                pos;

            do {
                top += el.offsetTop || 0;
                left += el.offsetLeft || 0;

                //add borders
                top += parseInt(L.DomUtil.getStyle(el, 'borderTopWidth'), 10) || 0;
                left += parseInt(L.DomUtil.getStyle(el, 'borderLeftWidth'), 10) || 0;

                pos = L.DomUtil.getStyle(el, 'position');

                if (el.offsetParent === docBody && pos === 'absolute') { break; }

                if (pos === 'fixed') {
                    top += docBody.scrollTop || docEl.scrollTop || 0;
                    left += docBody.scrollLeft || docEl.scrollLeft || 0;
                    break;
                }

                if (pos === 'relative' && !el.offsetLeft) {
                    var width = L.DomUtil.getStyle(el, 'width'),
                        maxWidth = L.DomUtil.getStyle(el, 'max-width'),
                        r = el.getBoundingClientRect();

                    if (width !== 'none' || maxWidth !== 'none') {
                        left += r.left + el.clientLeft;
                    }

                    //calculate full y offset since we're breaking out of the loop
                    top += r.top + (docBody.scrollTop || docEl.scrollTop || 0);

                    break;
                }

                el = el.offsetParent;

            } while (el);

            el = element;

            do {
                if (el === docBody) { break; }

                top -= el.scrollTop || 0;
                left -= el.scrollLeft || 0;

                el = el.parentNode;
            } while (el);

            return new L.Point(left, top);
        },

        documentIsLtr: function () {
            if (!L.DomUtil._docIsLtrCached) {
                L.DomUtil._docIsLtrCached = true;
                L.DomUtil._docIsLtr = L.DomUtil.getStyle(document.body, 'direction') === 'ltr';
            }
            return L.DomUtil._docIsLtr;
        },

        create: function (tagName, className, container) {

            var el = document.createElement(tagName);
            el.className = className;

            if (container) {
                container.appendChild(el);
            }

            return el;
        },

        hasClass: function (el, name) {
            if (el.classList !== undefined) {
                return el.classList.contains(name);
            }
            var className = L.DomUtil._getClass(el);
            return className.length > 0 && new RegExp('(^|\\s)' + name + '(\\s|$)').test(className);
        },

        addClass: function (el, name) {
            if (el.classList !== undefined) {
                var classes = L.Util.splitWords(name);
                for (var i = 0, len = classes.length; i < len; i++) {
                    el.classList.add(classes[i]);
                }
            } else if (!L.DomUtil.hasClass(el, name)) {
                var className = L.DomUtil._getClass(el);
                L.DomUtil._setClass(el, (className ? className + ' ' : '') + name);
            }
        },

        removeClass: function (el, name) {
            if (el.classList !== undefined) {
                el.classList.remove(name);
            } else {
                L.DomUtil._setClass(el, L.Util.trim((' ' + L.DomUtil._getClass(el) + ' ').replace(' ' + name + ' ', ' ')));
            }
        },

        _setClass: function (el, name) {
            if (el.className.baseVal === undefined) {
                el.className = name;
            } else {
                // in case of SVG element
                el.className.baseVal = name;
            }
        },

        _getClass: function (el) {
            return el.className.baseVal === undefined ? el.className : el.className.baseVal;
        },

        setOpacity: function (el, value) {

            if ('opacity' in el.style) {
                el.style.opacity = value;

            } else if ('filter' in el.style) {

                var filter = false,
                    filterName = 'DXImageTransform.Microsoft.Alpha';

                // filters collection throws an error if we try to retrieve a filter that doesn't exist
                try {
                    filter = el.filters.item(filterName);
                } catch (e) {
                    // don't set opacity to 1 if we haven't already set an opacity,
                    // it isn't needed and breaks transparent pngs.
                    if (value === 1) { return; }
                }

                value = Math.round(value * 100);

                if (filter) {
                    filter.Enabled = (value !== 100);
                    filter.Opacity = value;
                } else {
                    el.style.filter += ' progid:' + filterName + '(opacity=' + value + ')';
                }
            }
        },

        testProp: function (props) {

            var style = document.documentElement.style;

            for (var i = 0; i < props.length; i++) {
                if (props[i] in style) {
                    return props[i];
                }
            }
            return false;
        },

        getTranslateString: function (point) {
            // on WebKit browsers (Chrome/Safari/iOS Safari/Android) using translate3d instead of translate
            // makes animation smoother as it ensures HW accel is used. Firefox 13 doesn't care
            // (same speed either way), Opera 12 doesn't support translate3d

            var is3d = L.Browser.webkit3d,
                open = 'translate' + (is3d ? '3d' : '') + '(',
                close = (is3d ? ',0' : '') + ')';

            return open + point.x + 'px,' + point.y + 'px' + close;
        },

        getScaleString: function (scale, origin) {

            var preTranslateStr = L.DomUtil.getTranslateString(origin.add(origin.multiplyBy(-1 * scale))),
                scaleStr = ' scale(' + scale + ') ';

            return preTranslateStr + scaleStr;
        },

        setPosition: function (el, point, disable3D) { // (HTMLElement, Point[, Boolean])

            // jshint camelcase: false
            el._leaflet_pos = point;

            if (!disable3D && L.Browser.any3d) {
                el.style[L.DomUtil.TRANSFORM] = L.DomUtil.getTranslateString(point);
            } else {
                el.style.left = point.x + 'px';
                el.style.top = point.y + 'px';
            }
        },

        getPosition: function (el) {
            // this method is only used for elements previously positioned using setPosition,
            // so it's safe to cache the position for performance

            // jshint camelcase: false
            return el._leaflet_pos;
        }
    };


    // prefix style property names

    L.DomUtil.TRANSFORM = L.DomUtil.testProp(
            ['transform', 'WebkitTransform', 'OTransform', 'MozTransform', 'msTransform']);

    // webkitTransition comes first because some browser versions that drop vendor prefix don't do
    // the same for the transitionend event, in particular the Android 4.1 stock browser

    L.DomUtil.TRANSITION = L.DomUtil.testProp(
            ['webkitTransition', 'transition', 'OTransition', 'MozTransition', 'msTransition']);

    L.DomUtil.TRANSITION_END =
            L.DomUtil.TRANSITION === 'webkitTransition' || L.DomUtil.TRANSITION === 'OTransition' ?
            L.DomUtil.TRANSITION + 'End' : 'transitionend';

    (function () {
        if ('onselectstart' in document) {
            L.extend(L.DomUtil, {
                disableTextSelection: function () {
                    L.DomEvent.on(window, 'selectstart', L.DomEvent.preventDefault);
                },

                enableTextSelection: function () {
                    L.DomEvent.off(window, 'selectstart', L.DomEvent.preventDefault);
                }
            });
        } else {
            var userSelectProperty = L.DomUtil.testProp(
                ['userSelect', 'WebkitUserSelect', 'OUserSelect', 'MozUserSelect', 'msUserSelect']);

            L.extend(L.DomUtil, {
                disableTextSelection: function () {
                    if (userSelectProperty) {
                        var style = document.documentElement.style;
                        this._userSelect = style[userSelectProperty];
                        style[userSelectProperty] = 'none';
                    }
                },

                enableTextSelection: function () {
                    if (userSelectProperty) {
                        document.documentElement.style[userSelectProperty] = this._userSelect;
                        delete this._userSelect;
                    }
                }
            });
        }

        L.extend(L.DomUtil, {
            disableImageDrag: function () {
                L.DomEvent.on(window, 'dragstart', L.DomEvent.preventDefault);
            },

            enableImageDrag: function () {
                L.DomEvent.off(window, 'dragstart', L.DomEvent.preventDefault);
            }
        });
    })();


    /*
     * L.LatLng represents a geographical point with latitude and longitude coordinates.
     */

    L.LatLng = function (lat, lng, alt) { // (Number, Number, Number)
        lat = parseFloat(lat);
        lng = parseFloat(lng);

        if (isNaN(lat) || isNaN(lng)) {
            throw new Error('Invalid LatLng object: (' + lat + ', ' + lng + ')');
        }

        this.lat = lat;
        this.lng = lng;

        if (alt !== undefined) {
            this.alt = parseFloat(alt);
        }
    };

    L.extend(L.LatLng, {
        DEG_TO_RAD: Math.PI / 180,
        RAD_TO_DEG: 180 / Math.PI,
        MAX_MARGIN: 1.0E-9 // max margin of error for the "equals" check
    });

    L.LatLng.prototype = {
        equals: function (obj) { // (LatLng) -> Boolean
            if (!obj) { return false; }

            obj = L.latLng(obj);

            var margin = Math.max(
                    Math.abs(this.lat - obj.lat),
                    Math.abs(this.lng - obj.lng));

            return margin <= L.LatLng.MAX_MARGIN;
        },

        toString: function (precision) { // (Number) -> String
            return 'LatLng(' +
                    L.Util.formatNum(this.lat, precision) + ', ' +
                    L.Util.formatNum(this.lng, precision) + ')';
        },

        // Haversine distance formula, see http://en.wikipedia.org/wiki/Haversine_formula
        // TODO move to projection code, LatLng shouldn't know about Earth
        distanceTo: function (other) { // (LatLng) -> Number
            other = L.latLng(other);

            var R = 6378137, // earth radius in meters
                d2r = L.LatLng.DEG_TO_RAD,
                dLat = (other.lat - this.lat) * d2r,
                dLon = (other.lng - this.lng) * d2r,
                lat1 = this.lat * d2r,
                lat2 = other.lat * d2r,
                sin1 = Math.sin(dLat / 2),
                sin2 = Math.sin(dLon / 2);

            var a = sin1 * sin1 + sin2 * sin2 * Math.cos(lat1) * Math.cos(lat2);

            return R * 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
        },

        wrap: function (a, b) { // (Number, Number) -> LatLng
            var lng = this.lng;

            a = a || -180;
            b = b || 180;

            lng = (lng + b) % (b - a) + (lng < a || lng === b ? b : a);

            return new L.LatLng(this.lat, lng);
        }
    };

    L.latLng = function (a, b) { // (LatLng) or ([Number, Number]) or (Number, Number)
        if (a instanceof L.LatLng) {
            return a;
        }
        if (L.Util.isArray(a)) {
            if (typeof a[0] === 'number' || typeof a[0] === 'string') {
                return new L.LatLng(a[0], a[1], a[2]);
            } else {
                return null;
            }
        }
        if (a === undefined || a === null) {
            return a;
        }
        if (typeof a === 'object' && 'lat' in a) {
            return new L.LatLng(a.lat, 'lng' in a ? a.lng : a.lon);
        }
        if (b === undefined) {
            return null;
        }
        return new L.LatLng(a, b);
    };



    /*
     * L.LatLngBounds represents a rectangular area on the map in geographical coordinates.
     */

    L.LatLngBounds = function (southWest, northEast) { // (LatLng, LatLng) or (LatLng[])
        if (!southWest) { return; }

        var latlngs = northEast ? [southWest, northEast] : southWest;

        for (var i = 0, len = latlngs.length; i < len; i++) {
            this.extend(latlngs[i]);
        }
    };

    L.LatLngBounds.prototype = {
        // extend the bounds to contain the given point or bounds
        extend: function (obj) { // (LatLng) or (LatLngBounds)
            if (!obj) { return this; }

            var latLng = L.latLng(obj);
            if (latLng !== null) {
                obj = latLng;
            } else {
                obj = L.latLngBounds(obj);
            }

            if (obj instanceof L.LatLng) {
                if (!this._southWest && !this._northEast) {
                    this._southWest = new L.LatLng(obj.lat, obj.lng);
                    this._northEast = new L.LatLng(obj.lat, obj.lng);
                } else {
                    this._southWest.lat = Math.min(obj.lat, this._southWest.lat);
                    this._southWest.lng = Math.min(obj.lng, this._southWest.lng);

                    this._northEast.lat = Math.max(obj.lat, this._northEast.lat);
                    this._northEast.lng = Math.max(obj.lng, this._northEast.lng);
                }
            } else if (obj instanceof L.LatLngBounds) {
                this.extend(obj._southWest);
                this.extend(obj._northEast);
            }
            return this;
        },

        // extend the bounds by a percentage
        pad: function (bufferRatio) { // (Number) -> LatLngBounds
            var sw = this._southWest,
                ne = this._northEast,
                heightBuffer = Math.abs(sw.lat - ne.lat) * bufferRatio,
                widthBuffer = Math.abs(sw.lng - ne.lng) * bufferRatio;

            return new L.LatLngBounds(
                    new L.LatLng(sw.lat - heightBuffer, sw.lng - widthBuffer),
                    new L.LatLng(ne.lat + heightBuffer, ne.lng + widthBuffer));
        },

        getCenter: function () { // -> LatLng
            return new L.LatLng(
                    (this._southWest.lat + this._northEast.lat) / 2,
                    (this._southWest.lng + this._northEast.lng) / 2);
        },

        getSouthWest: function () {
            return this._southWest;
        },

        getNorthEast: function () {
            return this._northEast;
        },

        getNorthWest: function () {
            return new L.LatLng(this.getNorth(), this.getWest());
        },

        getSouthEast: function () {
            return new L.LatLng(this.getSouth(), this.getEast());
        },

        getWest: function () {
            return this._southWest.lng;
        },

        getSouth: function () {
            return this._southWest.lat;
        },

        getEast: function () {
            return this._northEast.lng;
        },

        getNorth: function () {
            return this._northEast.lat;
        },

        contains: function (obj) { // (LatLngBounds) or (LatLng) -> Boolean
            if (typeof obj[0] === 'number' || obj instanceof L.LatLng) {
                obj = L.latLng(obj);
            } else {
                obj = L.latLngBounds(obj);
            }

            var sw = this._southWest,
                ne = this._northEast,
                sw2, ne2;

            if (obj instanceof L.LatLngBounds) {
                sw2 = obj.getSouthWest();
                ne2 = obj.getNorthEast();
            } else {
                sw2 = ne2 = obj;
            }

            return (sw2.lat >= sw.lat) && (ne2.lat <= ne.lat) &&
                   (sw2.lng >= sw.lng) && (ne2.lng <= ne.lng);
        },

        intersects: function (bounds) { // (LatLngBounds)
            bounds = L.latLngBounds(bounds);

            var sw = this._southWest,
                ne = this._northEast,
                sw2 = bounds.getSouthWest(),
                ne2 = bounds.getNorthEast(),

                latIntersects = (ne2.lat >= sw.lat) && (sw2.lat <= ne.lat),
                lngIntersects = (ne2.lng >= sw.lng) && (sw2.lng <= ne.lng);

            return latIntersects && lngIntersects;
        },

        toBBoxString: function () {
            return [this.getWest(), this.getSouth(), this.getEast(), this.getNorth()].join(',');
        },

        equals: function (bounds) { // (LatLngBounds)
            if (!bounds) { return false; }

            bounds = L.latLngBounds(bounds);

            return this._southWest.equals(bounds.getSouthWest()) &&
                   this._northEast.equals(bounds.getNorthEast());
        },

        isValid: function () {
            return !!(this._southWest && this._northEast);
        }
    };

    //TODO International date line?

    L.latLngBounds = function (a, b) { // (LatLngBounds) or (LatLng, LatLng)
        if (!a || a instanceof L.LatLngBounds) {
            return a;
        }
        return new L.LatLngBounds(a, b);
    };


    /*
     * L.Projection contains various geographical projections used by CRS classes.
     */

    L.Projection = {};


    /*
     * Spherical Mercator is the most popular map projection, used by EPSG:3857 CRS used by default.
     */

    L.Projection.SphericalMercator = {
        MAX_LATITUDE: 85.0511287798,

        project: function (latlng) { // (LatLng) -> Point
            var d = L.LatLng.DEG_TO_RAD,
                max = this.MAX_LATITUDE,
                lat = Math.max(Math.min(max, latlng.lat), -max),
                x = latlng.lng * d,
                y = lat * d;

            y = Math.log(Math.tan((Math.PI / 4) + (y / 2)));

            return new L.Point(x, y);
        },

        unproject: function (point) { // (Point, Boolean) -> LatLng
            var d = L.LatLng.RAD_TO_DEG,
                lng = point.x * d,
                lat = (2 * Math.atan(Math.exp(point.y)) - (Math.PI / 2)) * d;

            return new L.LatLng(lat, lng);
        }
    };


    /*
     * Simple equirectangular (Plate Carree) projection, used by CRS like EPSG:4326 and Simple.
     */

    L.Projection.LonLat = {
        project: function (latlng) {
            return new L.Point(latlng.lng, latlng.lat);
        },

        unproject: function (point) {
            return new L.LatLng(point.y, point.x);
        }
    };


    /*
     * L.CRS is a base object for all defined CRS (Coordinate Reference Systems) in Leaflet.
     */

    L.CRS = {
        latLngToPoint: function (latlng, zoom) { // (LatLng, Number) -> Point
            var projectedPoint = this.projection.project(latlng),
                scale = this.scale(zoom);

            return this.transformation._transform(projectedPoint, scale);
        },

        pointToLatLng: function (point, zoom) { // (Point, Number[, Boolean]) -> LatLng
            var scale = this.scale(zoom),
                untransformedPoint = this.transformation.untransform(point, scale);

            return this.projection.unproject(untransformedPoint);
        },

        project: function (latlng) {
            return this.projection.project(latlng);
        },

        scale: function (zoom) {
            return 256 * Math.pow(2, zoom);
        },

        getSize: function (zoom) {
            var s = this.scale(zoom);
            return L.point(s, s);
        }
    };


    /*
     * A simple CRS that can be used for flat non-Earth maps like panoramas or game maps.
     */

    L.CRS.Simple = L.extend({}, L.CRS, {
        projection: L.Projection.LonLat,
        transformation: new L.Transformation(1, 0, -1, 0),

        scale: function (zoom) {
            return Math.pow(2, zoom);
        }
    });


    /*
     * L.CRS.EPSG3857 (Spherical Mercator) is the most common CRS for web mapping
     * and is used by Leaflet by default.
     */

    L.CRS.EPSG3857 = L.extend({}, L.CRS, {
        code: 'EPSG:3857',

        projection: L.Projection.SphericalMercator,
        transformation: new L.Transformation(0.5 / Math.PI, 0.5, -0.5 / Math.PI, 0.5),

        project: function (latlng) { // (LatLng) -> Point
            var projectedPoint = this.projection.project(latlng),
                earthRadius = 6378137;
            return projectedPoint.multiplyBy(earthRadius);
        }
    });

    L.CRS.EPSG900913 = L.extend({}, L.CRS.EPSG3857, {
        code: 'EPSG:900913'
    });


    /*
     * L.CRS.EPSG4326 is a CRS popular among advanced GIS specialists.
     */

    L.CRS.EPSG4326 = L.extend({}, L.CRS, {
        code: 'EPSG:4326',

        projection: L.Projection.LonLat,
        transformation: new L.Transformation(1 / 360, 0.5, -1 / 360, 0.5)
    });


    /*
     * L.Map is the central class of the API - it is used to create a map.
     */

    L.Map = L.Class.extend({

        includes: L.Mixin.Events,

        options: {
            crs: L.CRS.EPSG3857,
            crsNum: "",
            /*
            center: LatLng,
            zoom: Number,
            layers: Array,
            */

            fadeAnimation: L.DomUtil.TRANSITION && !L.Browser.android23,
            trackResize: true,
            markerZoomAnimation: L.DomUtil.TRANSITION && L.Browser.any3d
        },

        initialize: function (id, options) { // (HTMLElement or String, Object)
            options = L.setOptions(this, options);

            var wk = this.options.crs.code.indexOf(':') + 1;
            this.options.crsNum = this.options.crs.code.slice(wk);

            this._initContainer(id);
            this._initLayout();

            // hack for https://github.com/Leaflet/Leaflet/issues/1980
            this._onResize = L.bind(this._onResize, this);

            this._initEvents();

            if (options.maxBounds) {
                this.setMaxBounds(options.maxBounds);
            }

            if (options.center && options.zoom !== undefined) {
                this.setView(L.latLng(options.center), options.zoom, { reset: true });
            }

            this._handlers = [];

            this._layers = {};
            this._zoomBoundLayers = {};
            this._tileLayersNum = 0;

            this.callInitHooks();

            this._addLayers(options.layers);
        },


        // public methods that modify map state

        // replaced by animation-powered implementation in Map.PanAnimation.js
        setView: function (center, zoom) {
            zoom = zoom === undefined ? this.getZoom() : zoom;
            this._resetView(L.latLng(center), this._limitZoom(zoom));
            return this;
        },

        setZoom: function (zoom, options) {
            if (!this._loaded) {
                this._zoom = this._limitZoom(zoom);
                return this;
            }
            return this.setView(this.getCenter(), zoom, { zoom: options });
        },

        zoomIn: function (delta, options) {
            return this.setZoom(this._zoom + (delta || 1), options);
        },

        zoomOut: function (delta, options) {
            return this.setZoom(this._zoom - (delta || 1), options);
        },

        setZoomAround: function (latlng, zoom, options) {
            var scale = this.getZoomScale(zoom),
                viewHalf = this.getSize().divideBy(2),
                containerPoint = latlng instanceof L.Point ? latlng : this.latLngToContainerPoint(latlng),

                centerOffset = containerPoint.subtract(viewHalf).multiplyBy(1 - 1 / scale),
                newCenter = this.containerPointToLatLng(viewHalf.add(centerOffset));

            return this.setView(newCenter, zoom, { zoom: options });
        },

        fitBounds: function (bounds, options) {

            options = options || {};
            bounds = bounds.getBounds ? bounds.getBounds() : L.latLngBounds(bounds);

            var paddingTL = L.point(options.paddingTopLeft || options.padding || [0, 0]),
                paddingBR = L.point(options.paddingBottomRight || options.padding || [0, 0]),

                zoom = this.getBoundsZoom(bounds, false, paddingTL.add(paddingBR)),
                paddingOffset = paddingBR.subtract(paddingTL).divideBy(2),

                swPoint = this.project(bounds.getSouthWest(), zoom),
                nePoint = this.project(bounds.getNorthEast(), zoom),
                center = this.unproject(swPoint.add(nePoint).divideBy(2).add(paddingOffset), zoom);

            zoom = options && options.maxZoom ? Math.min(options.maxZoom, zoom) : zoom;
            /*
            *修改说明：解决地图定位时级数太大问题
            *修改人：  陈永红
            *修改时间：2015/12/2
            *注释说明：减小一级
            */
            //=============================================================
            zoom = zoom - 1 >= 0 ? zoom - 1 : zoom;
            //=============================================================
            return this.setView(center, zoom, options);
        },

        fitWorld: function (options) {
            return this.fitBounds([[-90, -180], [90, 180]], options);
        },

        panTo: function (center, options) { // (LatLng)
            return this.setView(center, this._zoom, { pan: options });
        },

        panBy: function (offset) { // (Point)
            // replaced with animated panBy in Map.PanAnimation.js
            this.fire('movestart');

            this._rawPanBy(L.point(offset));

            this.fire('move');
            return this.fire('moveend');
        },

        setMaxBounds: function (bounds) {
            bounds = L.latLngBounds(bounds);

            this.options.maxBounds = bounds;

            if (!bounds) {
                return this.off('moveend', this._panInsideMaxBounds, this);
            }

            if (this._loaded) {
                this._panInsideMaxBounds();
            }

            return this.on('moveend', this._panInsideMaxBounds, this);
        },

        panInsideBounds: function (bounds, options) {
            var center = this.getCenter(),
                newCenter = this._limitCenter(center, this._zoom, bounds);

            if (center.equals(newCenter)) { return this; }

            return this.panTo(newCenter, options);
        },

        addLayer: function (layer) {
            // TODO method is too big, refactor

            var id = L.stamp(layer);

            if (this._layers[id]) { return this; }

            this._layers[id] = layer;

            // TODO getMaxZoom, getMinZoom in ILayer (instead of options)
            if (layer.options && (!isNaN(layer.options.maxZoom) || !isNaN(layer.options.minZoom))) {
                this._zoomBoundLayers[id] = layer;
                this._updateZoomLevels();
            }

            // TODO looks ugly, refactor!!!
            if (this.options.zoomAnimation && L.TileLayer && (layer instanceof L.TileLayer)) {
                this._tileLayersNum++;
                this._tileLayersToLoad++;
                layer.on('load', this._onTileLayerLoad, this);
            }

            if (this._loaded) {
                this._layerAdd(layer);
            }

            return this;
        },

        removeLayer: function (layer) {
            var id = L.stamp(layer);

            if (!this._layers[id]) { return this; }

            if (this._loaded) {
                layer.onRemove(this);
            }

            delete this._layers[id];

            if (this._loaded) {
                this.fire('layerremove', { layer: layer });
            }

            if (this._zoomBoundLayers[id]) {
                delete this._zoomBoundLayers[id];
                this._updateZoomLevels();
            }

            // TODO looks ugly, refactor
            if (this.options.zoomAnimation && L.TileLayer && (layer instanceof L.TileLayer)) {
                this._tileLayersNum--;
                this._tileLayersToLoad--;
                layer.off('load', this._onTileLayerLoad, this);
            }

            return this;
        },

        hasLayer: function (layer) {
            if (!layer) { return false; }

            return (L.stamp(layer) in this._layers);
        },

        eachLayer: function (method, context) {
            for (var i in this._layers) {
                method.call(context, this._layers[i]);
            }
            return this;
        },

        invalidateSize: function (options) {
            if (!this._loaded) { return this; }

            options = L.extend({
                animate: false,
                pan: true
            }, options === true ? { animate: true } : options);

            var oldSize = this.getSize();
            this._sizeChanged = true;
            this._initialCenter = null;

            var newSize = this.getSize(),
                oldCenter = oldSize.divideBy(2).round(),
                newCenter = newSize.divideBy(2).round(),
                offset = oldCenter.subtract(newCenter);

            if (!offset.x && !offset.y) { return this; }

            if (options.animate && options.pan) {
                this.panBy(offset);

            } else {
                if (options.pan) {
                    this._rawPanBy(offset);
                }

                this.fire('move');

                if (options.debounceMoveend) {
                    clearTimeout(this._sizeTimer);
                    this._sizeTimer = setTimeout(L.bind(this.fire, this, 'moveend'), 200);
                } else {
                    this.fire('moveend');
                }
            }

            return this.fire('resize', {
                oldSize: oldSize,
                newSize: newSize
            });
        },

        // TODO handler.addTo
        addHandler: function (name, HandlerClass) {
            if (!HandlerClass) { return this; }

            var handler = this[name] = new HandlerClass(this);

            this._handlers.push(handler);

            if (this.options[name]) {
                handler.enable();
            }

            return this;
        },

        remove: function () {
            if (this._loaded) {
                this.fire('unload');
            }

            this._initEvents('off');

            try {
                // throws error in IE6-8
                delete this._container._leaflet;
            } catch (e) {
                this._container._leaflet = undefined;
            }

            this._clearPanes();
            if (this._clearControlPos) {
                this._clearControlPos();
            }

            this._clearHandlers();

            return this;
        },


        // public methods for getting map state

        getCenter: function () { // (Boolean) -> LatLng
            this._checkIfLoaded();

            if (this._initialCenter && !this._moved()) {
                return this._initialCenter;
            }
            return this.layerPointToLatLng(this._getCenterLayerPoint());
        },

        getZoom: function () {
            return this._zoom;
        },

        getBounds: function () {
            var bounds = this.getPixelBounds(),
                sw = this.unproject(bounds.getBottomLeft()),
                ne = this.unproject(bounds.getTopRight());

            return new L.LatLngBounds(sw, ne);
        },

        getMinZoom: function () {
            return this.options.minZoom === undefined ?
                (this._layersMinZoom === undefined ? 0 : this._layersMinZoom) :
                this.options.minZoom;
        },

        getMaxZoom: function () {
            return this.options.maxZoom === undefined ?
                (this._layersMaxZoom === undefined ? Infinity : this._layersMaxZoom) :
                this.options.maxZoom;
        },

        getBoundsZoom: function (bounds, inside, padding) { // (LatLngBounds[, Boolean, Point]) -> Number
            bounds = L.latLngBounds(bounds);

            var zoom = this.getMinZoom() - (inside ? 1 : 0),
                maxZoom = this.getMaxZoom(),
                size = this.getSize(),

                nw = bounds.getNorthWest(),
                se = bounds.getSouthEast(),

                zoomNotFound = true,
                boundsSize;

            padding = L.point(padding || [0, 0]);

            do {
                zoom++;
                boundsSize = this.project(se, zoom).subtract(this.project(nw, zoom)).add(padding);
                zoomNotFound = !inside ? size.contains(boundsSize) : boundsSize.x < size.x || boundsSize.y < size.y;

            } while (zoomNotFound && zoom <= maxZoom);

            if (zoomNotFound && inside) {
                return null;
            }

            return inside ? zoom : zoom - 1;
        },

        getSize: function () {
            if (!this._size || this._sizeChanged) {
                this._size = new L.Point(
                    this._container.clientWidth,
                    this._container.clientHeight);

                this._sizeChanged = false;
            }
            return this._size.clone();
        },

        getPixelBounds: function () {
            var topLeftPoint = this._getTopLeftPoint();
            return new L.Bounds(topLeftPoint, topLeftPoint.add(this.getSize()));
        },

        getPixelOrigin: function () {
            this._checkIfLoaded();
            return this._initialTopLeftPoint;
        },

        getPanes: function () {
            return this._panes;
        },

        getContainer: function () {
            return this._container;
        },


        // TODO replace with universal implementation after refactoring projections

        getZoomScale: function (toZoom) {
            var crs = this.options.crs;
            return crs.scale(toZoom) / crs.scale(this._zoom);
        },

        getScaleZoom: function (scale) {
            return this._zoom + (Math.log(scale) / Math.LN2);
        },


        // conversion methods

        project: function (latlng, zoom) { // (LatLng[, Number]) -> Point
            zoom = zoom === undefined ? this._zoom : zoom;
            return this.options.crs.latLngToPoint(L.latLng(latlng), zoom);
        },

        unproject: function (point, zoom) { // (Point[, Number]) -> LatLng
            zoom = zoom === undefined ? this._zoom : zoom;
            return this.options.crs.pointToLatLng(L.point(point), zoom);
        },

        layerPointToLatLng: function (point) { // (Point)
            var projectedPoint = L.point(point).add(this.getPixelOrigin());
            return this.unproject(projectedPoint);
        },

        latLngToLayerPoint: function (latlng) { // (LatLng)
            var projectedPoint = this.project(L.latLng(latlng))._round();
            return projectedPoint._subtract(this.getPixelOrigin());
        },

        containerPointToLayerPoint: function (point) { // (Point)
            return L.point(point).subtract(this._getMapPanePos());
        },

        layerPointToContainerPoint: function (point) { // (Point)
            return L.point(point).add(this._getMapPanePos());
        },

        containerPointToLatLng: function (point) {
            var layerPoint = this.containerPointToLayerPoint(L.point(point));
            return this.layerPointToLatLng(layerPoint);
        },

        latLngToContainerPoint: function (latlng) {
            return this.layerPointToContainerPoint(this.latLngToLayerPoint(L.latLng(latlng)));
        },

        mouseEventToContainerPoint: function (e) { // (MouseEvent)
            return L.DomEvent.getMousePosition(e, this._container);
        },

        mouseEventToLayerPoint: function (e) { // (MouseEvent)
            return this.containerPointToLayerPoint(this.mouseEventToContainerPoint(e));
        },

        mouseEventToLatLng: function (e) { // (MouseEvent)
            return this.layerPointToLatLng(this.mouseEventToLayerPoint(e));
        },


        // map initialization methods

        _initContainer: function (id) {
            var container = this._container = L.DomUtil.get(id);

            if (!container) {
                throw new Error('Map container not found.');
            } else if (container._leaflet) {
                throw new Error('Map container is already initialized.');
            }

            container._leaflet = true;
        },

        _initLayout: function () {
            var container = this._container;

            L.DomUtil.addClass(container, 'leaflet-container' +
                (L.Browser.touch ? ' leaflet-touch' : '') +
                (L.Browser.retina ? ' leaflet-retina' : '') +
                (L.Browser.ielt9 ? ' leaflet-oldie' : '') +
                (this.options.fadeAnimation ? ' leaflet-fade-anim' : ''));

            var position = L.DomUtil.getStyle(container, 'position');

            if (position !== 'absolute' && position !== 'relative' && position !== 'fixed') {
                container.style.position = 'relative';
            }

            this._initPanes();

            if (this._initControlPos) {
                this._initControlPos();
            }
        },

        _initPanes: function () {
            var panes = this._panes = {};

            this._mapPane = panes.mapPane = this._createPane('leaflet-map-pane', this._container);

            this._tilePane = panes.tilePane = this._createPane('leaflet-tile-pane', this._mapPane);
            panes.objectsPane = this._createPane('leaflet-objects-pane', this._mapPane);
            panes.shadowPane = this._createPane('leaflet-shadow-pane');
            panes.overlayPane = this._createPane('leaflet-overlay-pane');
            panes.markerPane = this._createPane('leaflet-marker-pane');
            panes.popupPane = this._createPane('leaflet-popup-pane');

            var zoomHide = ' leaflet-zoom-hide';

            if (!this.options.markerZoomAnimation) {
                L.DomUtil.addClass(panes.markerPane, zoomHide);
                L.DomUtil.addClass(panes.shadowPane, zoomHide);
                L.DomUtil.addClass(panes.popupPane, zoomHide);
            }
        },

        _createPane: function (className, container) {
            return L.DomUtil.create('div', className, container || this._panes.objectsPane);
        },

        _clearPanes: function () {
            this._container.removeChild(this._mapPane);
        },

        _addLayers: function (layers) {
            layers = layers ? (L.Util.isArray(layers) ? layers : [layers]) : [];

            for (var i = 0, len = layers.length; i < len; i++) {
                this.addLayer(layers[i]);
            }
        },


        // private methods that modify map state

        _resetView: function (center, zoom, preserveMapOffset, afterZoomAnim) {

            var zoomChanged = (this._zoom !== zoom);

            if (!afterZoomAnim) {
                this.fire('movestart');

                if (zoomChanged) {
                    this.fire('zoomstart');
                }
            }

            this._zoom = zoom;
            this._initialCenter = center;

            this._initialTopLeftPoint = this._getNewTopLeftPoint(center);

            if (!preserveMapOffset) {
                L.DomUtil.setPosition(this._mapPane, new L.Point(0, 0));
            } else {
                this._initialTopLeftPoint._add(this._getMapPanePos());
            }

            this._tileLayersToLoad = this._tileLayersNum;

            var loading = !this._loaded;
            this._loaded = true;

            this.fire('viewreset', { hard: !preserveMapOffset });

            if (loading) {
                this.fire('load');
                this.eachLayer(this._layerAdd, this);
            }

            this.fire('move');

            if (zoomChanged || afterZoomAnim) {
                this.fire('zoomend');
            }

            this.fire('moveend', { hard: !preserveMapOffset });
        },

        _rawPanBy: function (offset) {
            L.DomUtil.setPosition(this._mapPane, this._getMapPanePos().subtract(offset));
        },

        _getZoomSpan: function () {
            return this.getMaxZoom() - this.getMinZoom();
        },

        _updateZoomLevels: function () {
            var i,
                minZoom = Infinity,
                maxZoom = -Infinity,
                oldZoomSpan = this._getZoomSpan();

            for (i in this._zoomBoundLayers) {
                var layer = this._zoomBoundLayers[i];
                if (!isNaN(layer.options.minZoom)) {
                    minZoom = Math.min(minZoom, layer.options.minZoom);
                }
                if (!isNaN(layer.options.maxZoom)) {
                    maxZoom = Math.max(maxZoom, layer.options.maxZoom);
                }
            }

            if (i === undefined) { // we have no tilelayers
                this._layersMaxZoom = this._layersMinZoom = undefined;
            } else {
                this._layersMaxZoom = maxZoom;
                this._layersMinZoom = minZoom;
            }

            if (oldZoomSpan !== this._getZoomSpan()) {
                this.fire('zoomlevelschange');
            }
        },

        _panInsideMaxBounds: function () {
            this.panInsideBounds(this.options.maxBounds);
        },

        _checkIfLoaded: function () {
            if (!this._loaded) {
                throw new Error('Set map center and zoom first.');
            }
        },

        // map events

        _initEvents: function (onOff) {
            if (!L.DomEvent) { return; }

            onOff = onOff || 'on';

            L.DomEvent[onOff](this._container, 'click', this._onMouseClick, this);

            var events = ['dblclick', 'mousedown', 'mouseup', 'mouseenter',
                          'mouseleave', 'mousemove', 'contextmenu'],
                i, len;

            for (i = 0, len = events.length; i < len; i++) {
                L.DomEvent[onOff](this._container, events[i], this._fireMouseEvent, this);
            }

            if (this.options.trackResize) {
                L.DomEvent[onOff](window, 'resize', this._onResize, this);
            }
        },

        _onResize: function () {
            L.Util.cancelAnimFrame(this._resizeRequest);
            this._resizeRequest = L.Util.requestAnimFrame(
                    function () { this.invalidateSize({ debounceMoveend: true }); }, this, false, this._container);
        },

        _onMouseClick: function (e) {
            if (!this._loaded || (!e._simulated &&
                    ((this.dragging && this.dragging.moved()) ||
                     (this.boxZoom && this.boxZoom.moved()))) ||
                        L.DomEvent._skipped(e)) { return; }

            this.fire('preclick');
            this._fireMouseEvent(e);
        },

        _fireMouseEvent: function (e) {
            if (!this._loaded || L.DomEvent._skipped(e)) { return; }

            var type = e.type;

            type = (type === 'mouseenter' ? 'mouseover' : (type === 'mouseleave' ? 'mouseout' : type));

            if (!this.hasEventListeners(type)) { return; }

            if (type === 'contextmenu') {
                L.DomEvent.preventDefault(e);
            }

            var containerPoint = this.mouseEventToContainerPoint(e),
                layerPoint = this.containerPointToLayerPoint(containerPoint),
                latlng = this.layerPointToLatLng(layerPoint);

            this.fire(type, {
                latlng: latlng,
                layerPoint: layerPoint,
                containerPoint: containerPoint,
                originalEvent: e
            });
        },

        _onTileLayerLoad: function () {
            this._tileLayersToLoad--;
            if (this._tileLayersNum && !this._tileLayersToLoad) {
                this.fire('tilelayersload');
            }
        },

        _clearHandlers: function () {
            for (var i = 0, len = this._handlers.length; i < len; i++) {
                this._handlers[i].disable();
            }
        },

        whenReady: function (callback, context) {
            if (this._loaded) {
                callback.call(context || this, this);
            } else {
                this.on('load', callback, context);
            }
            return this;
        },

        _layerAdd: function (layer) {
            layer.onAdd(this);
            this.fire('layeradd', { layer: layer });
        },


        // private methods for getting map state

        _getMapPanePos: function () {
            return L.DomUtil.getPosition(this._mapPane);
        },

        _moved: function () {
            var pos = this._getMapPanePos();
            return pos && !pos.equals([0, 0]);
        },

        _getTopLeftPoint: function () {
            return this.getPixelOrigin().subtract(this._getMapPanePos());
        },

        _getNewTopLeftPoint: function (center, zoom) {
            var viewHalf = this.getSize()._divideBy(2);
            // TODO round on display, not calculation to increase precision?
            return this.project(center, zoom)._subtract(viewHalf)._round();
        },

        _latLngToNewLayerPoint: function (latlng, newZoom, newCenter) {
            var topLeft = this._getNewTopLeftPoint(newCenter, newZoom).add(this._getMapPanePos());
            return this.project(latlng, newZoom)._subtract(topLeft);
        },

        // layer point of the current center
        _getCenterLayerPoint: function () {
            return this.containerPointToLayerPoint(this.getSize()._divideBy(2));
        },

        // offset of the specified place to the current center in pixels
        _getCenterOffset: function (latlng) {
            return this.latLngToLayerPoint(latlng).subtract(this._getCenterLayerPoint());
        },

        // adjust center for view to get inside bounds
        _limitCenter: function (center, zoom, bounds) {

            if (!bounds) { return center; }

            var centerPoint = this.project(center, zoom),
                viewHalf = this.getSize().divideBy(2),
                viewBounds = new L.Bounds(centerPoint.subtract(viewHalf), centerPoint.add(viewHalf)),
                offset = this._getBoundsOffset(viewBounds, bounds, zoom);

            return this.unproject(centerPoint.add(offset), zoom);
        },

        // adjust offset for view to get inside bounds
        _limitOffset: function (offset, bounds) {
            if (!bounds) { return offset; }

            var viewBounds = this.getPixelBounds(),
                newBounds = new L.Bounds(viewBounds.min.add(offset), viewBounds.max.add(offset));

            return offset.add(this._getBoundsOffset(newBounds, bounds));
        },

        // returns offset needed for pxBounds to get inside maxBounds at a specified zoom
        _getBoundsOffset: function (pxBounds, maxBounds, zoom) {
            var nwOffset = this.project(maxBounds.getNorthWest(), zoom).subtract(pxBounds.min),
                seOffset = this.project(maxBounds.getSouthEast(), zoom).subtract(pxBounds.max),

                dx = this._rebound(nwOffset.x, -seOffset.x),
                dy = this._rebound(nwOffset.y, -seOffset.y);

            return new L.Point(dx, dy);
        },

        _rebound: function (left, right) {
            return left + right > 0 ?
                Math.round(left - right) / 2 :
                Math.max(0, Math.ceil(left)) - Math.max(0, Math.floor(right));
        },

        _limitZoom: function (zoom) {
            var min = this.getMinZoom(),
                max = this.getMaxZoom();

            return Math.max(min, Math.min(max, zoom));
        }
    });

    L.map = function (id, options) {
        return new L.Map(id, options);
    };


    /*
     * Mercator projection that takes into account that the Earth is not a perfect sphere.
     * Less popular than spherical mercator; used by projections like EPSG:3395.
     */

    L.Projection.Mercator = {
        MAX_LATITUDE: 85.0840591556,

        R_MINOR: 6356752.314245179,
        R_MAJOR: 6378137,

        project: function (latlng) { // (LatLng) -> Point
            var d = L.LatLng.DEG_TO_RAD,
                max = this.MAX_LATITUDE,
                lat = Math.max(Math.min(max, latlng.lat), -max),
                r = this.R_MAJOR,
                r2 = this.R_MINOR,
                x = latlng.lng * d * r,
                y = lat * d,
                tmp = r2 / r,
                eccent = Math.sqrt(1.0 - tmp * tmp),
                con = eccent * Math.sin(y);

            con = Math.pow((1 - con) / (1 + con), eccent * 0.5);

            var ts = Math.tan(0.5 * ((Math.PI * 0.5) - y)) / con;
            y = -r * Math.log(ts);

            return new L.Point(x, y);
        },

        unproject: function (point) { // (Point, Boolean) -> LatLng
            var d = L.LatLng.RAD_TO_DEG,
                r = this.R_MAJOR,
                r2 = this.R_MINOR,
                lng = point.x * d / r,
                tmp = r2 / r,
                eccent = Math.sqrt(1 - (tmp * tmp)),
                ts = Math.exp(-point.y / r),
                phi = (Math.PI / 2) - 2 * Math.atan(ts),
                numIter = 15,
                tol = 1e-7,
                i = numIter,
                dphi = 0.1,
                con;

            while ((Math.abs(dphi) > tol) && (--i > 0)) {
                con = eccent * Math.sin(phi);
                dphi = (Math.PI / 2) - 2 * Math.atan(ts *
                            Math.pow((1.0 - con) / (1.0 + con), 0.5 * eccent)) - phi;
                phi += dphi;
            }

            return new L.LatLng(phi * d, lng);
        }
    };



    L.CRS.EPSG3395 = L.extend({}, L.CRS, {
        code: 'EPSG:3395',

        projection: L.Projection.Mercator,

        transformation: (function () {
            var m = L.Projection.Mercator,
                r = m.R_MAJOR,
                scale = 0.5 / (Math.PI * r);

            return new L.Transformation(scale, 0.5, -scale, 0.5);
        }())
    });


    /*
     * L.TileLayer is used for standard xyz-numbered tile layers.
     */

    L.TileLayer = L.Class.extend({
        includes: L.Mixin.Events,

        options: {
            minZoom: 0,
            maxZoom: 18,
            tileSize: 256,
            subdomains: 'abc',
            errorTileUrl: '',
            attribution: '',
            zoomOffset: 0,
            opacity: 1,
            /*
            maxNativeZoom: null,
            zIndex: null,
            tms: false,
            continuousWorld: false,
            noWrap: false,
            zoomReverse: false,
            detectRetina: false,
            reuseTiles: false,
            bounds: false,
            */
            unloadInvisibleTiles: L.Browser.mobile,
            updateWhenIdle: L.Browser.mobile
        },

        initialize: function (url, options) {
            options = L.setOptions(this, options);

            // detecting retina displays, adjusting tileSize and zoom levels
            if (options.detectRetina && L.Browser.retina && options.maxZoom > 0) {

                options.tileSize = Math.floor(options.tileSize / 2);
                options.zoomOffset++;

                if (options.minZoom > 0) {
                    options.minZoom--;
                }
                this.options.maxZoom--;
            }

            if (options.bounds) {
                options.bounds = L.latLngBounds(options.bounds);
            }

            this._url = url;

            var subdomains = this.options.subdomains;

            if (typeof subdomains === 'string') {
                this.options.subdomains = subdomains.split('');
            }
        },

        onAdd: function (map) {
            this._map = map;
            this._animated = map._zoomAnimated;

            // create a container div for tiles
            this._initContainer();

            // set up events
            map.on({
                'viewreset': this._reset,
                'moveend': this._update
            }, this);

            if (this._animated) {
                map.on({
                    'zoomanim': this._animateZoom,
                    'zoomend': this._endZoomAnim
                }, this);
            }

            if (!this.options.updateWhenIdle) {
                this._limitedUpdate = L.Util.limitExecByInterval(this._update, 150, this);
                map.on('move', this._limitedUpdate, this);
            }

            this._reset();
            this._update();
        },

        addTo: function (map) {
            map.addLayer(this);
            return this;
        },

        onRemove: function (map) {
            this._container.parentNode.removeChild(this._container);

            map.off({
                'viewreset': this._reset,
                'moveend': this._update
            }, this);

            if (this._animated) {
                map.off({
                    'zoomanim': this._animateZoom,
                    'zoomend': this._endZoomAnim
                }, this);
            }

            if (!this.options.updateWhenIdle) {
                map.off('move', this._limitedUpdate, this);
            }

            this._container = null;
            this._map = null;
        },

        bringToFront: function () {
            /*
            *修改说明：为解决切图和矢量图层的顺序调整问题，将放置的容器集合在一个统一的容器当中
            *修改影响：ImageOverlay类也有修改
            *修改时间：2015/8/6
            *注释说明：注释的代码为leaflet的源代码(勿删)
            */
            //=========================================
            var pane = this._map._panes.overlayPane;
            //var pane = this._map._panes.tilePane;
            //=========================================

            if (this._container) {
                pane.appendChild(this._container);
                this._setAutoZIndex(pane, Math.max);
            }

            return this;
        },

        bringToBack: function () {
            /*
            *修改说明：为解决切图和矢量图层的顺序调整问题，将放置的容器集合在一个统一的容器当中
            *修改影响：ImageOverlay类也有修改
            *修改时间：2015/8/6
            *注释说明：注释的代码为leaflet的源代码(勿删)
            */
            //=========================================
            var pane = this._map._panes.overlayPane;
            //var pane = this._map._panes.tilePane;
            //=========================================

            if (this._container) {
                pane.insertBefore(this._container, pane.firstChild);
                this._setAutoZIndex(pane, Math.min);
            }

            return this;
        },

        getAttribution: function () {
            return this.options.attribution;
        },

        getContainer: function () {
            return this._container;
        },

        setOpacity: function (opacity) {
            this.options.opacity = opacity;

            if (this._map) {
                this._updateOpacity();
            }

            return this;
        },

        setZIndex: function (zIndex) {
            this.options.zIndex = zIndex;
            this._updateZIndex();

            return this;
        },

        setUrl: function (url, noRedraw) {
            this._url = url;

            if (!noRedraw) {
                this.redraw();
            }

            return this;
        },

        redraw: function () {
            if (this._map) {
                this._reset({ hard: true });
                this._update();
            }
            return this;
        },

        _updateZIndex: function () {
            if (this._container && this.options.zIndex !== undefined) {
                this._container.style.zIndex = this.options.zIndex;
            }
        },

        _setAutoZIndex: function (pane, compare) {

            var layers = pane.children,
                edgeZIndex = -compare(Infinity, -Infinity), // -Infinity for max, Infinity for min
                zIndex, i, len;

            for (i = 0, len = layers.length; i < len; i++) {

                if (layers[i] !== this._container) {
                    zIndex = parseInt(layers[i].style.zIndex, 10);

                    if (!isNaN(zIndex)) {
                        edgeZIndex = compare(edgeZIndex, zIndex);
                    }
                }
            }

            this.options.zIndex = this._container.style.zIndex =
                    (isFinite(edgeZIndex) ? edgeZIndex : 0) + compare(1, -1);
        },

        _updateOpacity: function () {
            var i,
                tiles = this._tiles;

            if (L.Browser.ielt9) {
                for (i in tiles) {
                    L.DomUtil.setOpacity(tiles[i], this.options.opacity);
                }
            } else {
                L.DomUtil.setOpacity(this._container, this.options.opacity);
            }
        },

        _initContainer: function () {
            /*
            *修改说明：为解决切图和矢量图层的顺序调整问题，将放置的容器集合在一个统一的容器当中
            *修改影响：ImageOverlay类也有修改
            *修改时间：2015/8/6
            *注释说明：注释的代码为leaflet的源代码(勿删)
            */
            //var tilePane = this._map._panes.tilePane;

            //if (!this._container) {
            //    this._container = L.DomUtil.create('div', 'leaflet-layer');

            //    this._updateZIndex();

            //    if (this._animated) {
            //        var className = 'leaflet-tile-container';

            //        this._bgBuffer = L.DomUtil.create('div', className, this._container);
            //        this._tileContainer = L.DomUtil.create('div', className, this._container);

            //    } else {
            //        this._tileContainer = this._container;
            //    }
            //    tilePane.appendChild(this._container);

            //    if (this.options.opacity < 1) {
            //        this._updateOpacity();
            //    }
            //}

            var overlayPane = this._map._panes.overlayPane;
            if (!this._container) {
                this._container = L.DomUtil.create('div', 'leaflet-layer');

                //切图默认设置zIndex为所有leaflet-layer下的子节点数
                this._container.style.zIndex = overlayPane.childNodes.length;

                //this._updateZIndex();

                if (this._animated) {
                    var className = 'leaflet-tile-container';
                    this._bgBuffer = L.DomUtil.create('div', className, this._container);
                    this._tileContainer = L.DomUtil.create('div', className, this._container);
                } else {
                    this._tileContainer = this._container;
                }
                overlayPane.appendChild(this._container);

                if (this.options.opacity < 1) {
                    this._updateOpacity();
                }
            }
        },

        _reset: function (e) {
            for (var key in this._tiles) {
                this.fire('tileunload', { tile: this._tiles[key] });
            }

            this._tiles = {};
            this._tilesToLoad = 0;

            if (this.options.reuseTiles) {
                this._unusedTiles = [];
            }

            this._tileContainer.innerHTML = '';

            if (this._animated && e && e.hard) {
                this._clearBgBuffer();
            }

            this._initContainer();
        },

        _getTileSize: function () {
            var map = this._map,
                zoom = map.getZoom() + this.options.zoomOffset,
                zoomN = this.options.maxNativeZoom,
                tileSize = this.options.tileSize;

            if (zoomN && zoom > zoomN) {
                tileSize = Math.round(map.getZoomScale(zoom) / map.getZoomScale(zoomN) * tileSize);
            }

            return tileSize;
        },

        /*
        *修改说明：解决原点不一致时地图显示不出来的问题
        *修改时间：2015/8/7
        *注释说明：注释为原有代码（勿删）
        */
        //===============================================================================================================
        //_update: function () {

        //    if (!this._map) { return; }

        //    var map = this._map,
        //        bounds = map.getPixelBounds(),
        //        zoom = map.getZoom(),
        //        tileSize = this._getTileSize();

        //    if (zoom > this.options.maxZoom || zoom < this.options.minZoom) {
        //        return;
        //    }

        //    var tileBounds = L.bounds(
        //            bounds.min.divideBy(tileSize)._floor(),
        //            bounds.max.divideBy(tileSize)._floor());

        //    this._addTilesFromCenterOut(tileBounds);

        //    if (this.options.unloadInvisibleTiles || this.options.reuseTiles) {
        //        this._removeOtherTiles(tileBounds);
        //    }
        //},
        _update: function () {

            if (!this._map) { return; }

            var map = this._map,
                bounds = map.getPixelBounds(),
                zoom = map.getZoom(),
                tileSize = this._getTileSize();

            if (this.options.origin) {
                var mapOrigin = this._map.options.crs.options.origin;
                var layerOrigin = this.options.origin;

                if (mapOrigin[0] != layerOrigin[0] || mapOrigin[1] != layerOrigin[1]) {

                    /*
                    *修改说明:基于修改的代码进行代码优化
                    */
                    //=======================================================================
                    var scale = this._map.options.crs.scale(zoom);
                    var offsetPoint = L.point(scale * (mapOrigin[0] - layerOrigin[0]), scale * (layerOrigin[1] - mapOrigin[1]));

                    bounds.min = bounds.min.add(offsetPoint);
                    bounds.max = bounds.max.add(offsetPoint);

                    //========================================================================
                }
            }

            if (zoom > this.options.maxZoom || zoom < this.options.minZoom) {
                return;
            }

            var tileBounds = L.bounds(
                    bounds.min.divideBy(tileSize)._floor(),
                    bounds.max.divideBy(tileSize)._floor());

            this._addTilesFromCenterOut(tileBounds);

            if (this.options.unloadInvisibleTiles || this.options.reuseTiles) {
                this._removeOtherTiles(tileBounds);
            }
        },
        //==============================================================================================================

        _addTilesFromCenterOut: function (bounds) {
            var queue = [],
                center = bounds.getCenter();

            var j, i, point;

            for (j = bounds.min.y; j <= bounds.max.y; j++) {
                for (i = bounds.min.x; i <= bounds.max.x; i++) {
                    point = new L.Point(i, j);

                    if (this._tileShouldBeLoaded(point)) {
                        queue.push(point);
                    }
                }
            }

            var tilesToLoad = queue.length;

            if (tilesToLoad === 0) { return; }

            // load tiles in order of their distance to center
            queue.sort(function (a, b) {
                return a.distanceTo(center) - b.distanceTo(center);
            });

            var fragment = document.createDocumentFragment();

            // if its the first batch of tiles to load
            if (!this._tilesToLoad) {
                this.fire('loading');
            }

            this._tilesToLoad += tilesToLoad;

            for (i = 0; i < tilesToLoad; i++) {
                this._addTile(queue[i], fragment);
            }

            this._tileContainer.appendChild(fragment);
        },

        _tileShouldBeLoaded: function (tilePoint) {
            if ((tilePoint.x + ':' + tilePoint.y) in this._tiles) {
                return false; // already loaded
            }

            var options = this.options;

            if (!options.continuousWorld) {
                var limit = this._getWrapTileNum();

                // don't load if exceeds world bounds
                if ((options.noWrap && (tilePoint.x < 0 || tilePoint.x >= limit.x)) ||
                    tilePoint.y < 0 || tilePoint.y >= limit.y) { return false; }
            }

            if (options.bounds) {
                var tileSize = options.tileSize,
                    nwPoint = tilePoint.multiplyBy(tileSize),
                    sePoint = nwPoint.add([tileSize, tileSize]),
                    nw = this._map.unproject(nwPoint),
                    se = this._map.unproject(sePoint);

                // TODO temporary hack, will be removed after refactoring projections
                // https://github.com/Leaflet/Leaflet/issues/1618
                if (!options.continuousWorld && !options.noWrap) {
                    nw = nw.wrap();
                    se = se.wrap();
                }

                if (!options.bounds.intersects([nw, se])) { return false; }
            }

            return true;
        },

        _removeOtherTiles: function (bounds) {
            var kArr, x, y, key;

            for (key in this._tiles) {
                kArr = key.split(':');
                x = parseInt(kArr[0], 10);
                y = parseInt(kArr[1], 10);

                // remove tile if it's out of bounds
                if (x < bounds.min.x || x > bounds.max.x || y < bounds.min.y || y > bounds.max.y) {
                    this._removeTile(key);
                }
            }
        },

        _removeTile: function (key) {
            var tile = this._tiles[key];

            this.fire('tileunload', { tile: tile, url: tile.src });

            if (this.options.reuseTiles) {
                L.DomUtil.removeClass(tile, 'leaflet-tile-loaded');
                this._unusedTiles.push(tile);

            } else if (tile.parentNode === this._tileContainer) {
                this._tileContainer.removeChild(tile);
            }

            // for https://github.com/CloudMade/Leaflet/issues/137
            if (!L.Browser.android) {
                tile.onload = null;
                tile.src = L.Util.emptyImageUrl;
            }

            delete this._tiles[key];
        },

        _addTile: function (tilePoint, container) {
            var tilePos = this._getTilePos(tilePoint);

            // get unused tile - or create a new tile
            var tile = this._getTile();

            /*
            Chrome 20 layouts much faster with top/left (verify with timeline, frames)
            Android 4 browser has display issues with top/left and requires transform instead
            (other browsers don't currently care) - see debug/hacks/jitter.html for an example
            */
            L.DomUtil.setPosition(tile, tilePos, L.Browser.chrome);

            this._tiles[tilePoint.x + ':' + tilePoint.y] = tile;

            this._loadTile(tile, tilePoint);

            if (tile.parentNode !== this._tileContainer) {
                container.appendChild(tile);
            }
        },

        _getZoomForUrl: function () {

            var options = this.options,
                zoom = this._map.getZoom();

            if (options.zoomReverse) {
                zoom = options.maxZoom - zoom;
            }

            zoom += options.zoomOffset;

            return options.maxNativeZoom ? Math.min(zoom, options.maxNativeZoom) : zoom;
        },

        /*
         *修改说明：解决原点不一致时地图显示不出来的问题
         *修改时间：2015/8/7
         *注释说明：注释为原有代码（勿删）
         */
        //===============================================================================================================
        //_getTilePos: function (tilePoint) {
        //    var origin = this._map.getPixelOrigin(),
        //        tileSize = this._getTileSize();

        //    return tilePoint.multiplyBy(tileSize).subtract(origin);
        //},

        _getTilePos: function (tilePoint) {
            var origin = this._map.getPixelOrigin();
            if (this.options.origin) {
                var mapOrigin = this._map.options.crs.options.origin;
                var layerOrigin = this.options.origin;
                if (mapOrigin[0] != layerOrigin[0] || mapOrigin[1] != layerOrigin[1]) {

                    /*
                    *修改说明:基于修改的代码进行代码优化
                    *修改时间:2016/3/9
                    *修改人：付友强
                    */
                    //=====================================================

                    //var center = this._map.getCenter();
                    //var viewHalf = this._map.getSize()._divideBy(2);
                    //var crs = new L.Proj.CRS(Project_ParamConfig.crs.code, Project_ParamConfig.crs.defs, {
                    //    origin: layerOrigin,
                    //    resolutions: Project_ParamConfig.baseLayer.resolutions
                    //});
                    //var _initialTopLeftPoint = crs.latLngToPoint(center, this._map._zoom)._subtract(viewHalf)._round();
                    //_initialTopLeftPoint._add(this._map._getMapPanePos());
                    //origin = _initialTopLeftPoint;

                    var scale = this._map.options.crs.scale(this._map.getZoom());
                    var offsetPoint = L.point(scale * (mapOrigin[0] - layerOrigin[0]), scale * (layerOrigin[1] - mapOrigin[1]));

                    origin = origin.add(offsetPoint);

                    //======================================================
                }
            }
            var tileSize = this._getTileSize();

            return tilePoint.multiplyBy(tileSize).subtract(origin);
        },
        //==============================================================================================================

        // image-specific code (override to implement e.g. Canvas or SVG tile layer)

        getTileUrl: function (tilePoint) {
            return L.Util.template(this._url, L.extend({
                s: this._getSubdomain(tilePoint),
                z: tilePoint.z,
                x: tilePoint.x,
                y: tilePoint.y
            }, this.options));
        },

        _getWrapTileNum: function () {
            var crs = this._map.options.crs,
                size = crs.getSize(this._map.getZoom());
            return size.divideBy(this._getTileSize())._floor();
        },

        _adjustTilePoint: function (tilePoint) {

            var limit = this._getWrapTileNum();

            // wrap tile coordinates
            if (!this.options.continuousWorld && !this.options.noWrap) {
                tilePoint.x = ((tilePoint.x % limit.x) + limit.x) % limit.x;
            }

            if (this.options.tms) {
                tilePoint.y = limit.y - tilePoint.y - 1;
            }

            tilePoint.z = this._getZoomForUrl();
        },

        _getSubdomain: function (tilePoint) {
            var index = Math.abs(tilePoint.x + tilePoint.y) % this.options.subdomains.length;
            return this.options.subdomains[index];
        },

        _getTile: function () {
            if (this.options.reuseTiles && this._unusedTiles.length > 0) {
                var tile = this._unusedTiles.pop();
                this._resetTile(tile);
                return tile;
            }
            return this._createTile();
        },

        // Override if data stored on a tile needs to be cleaned up before reuse
        _resetTile: function (/*tile*/) { },

        _createTile: function () {
            var tile = L.DomUtil.create('img', 'leaflet-tile');
            tile.style.width = tile.style.height = this._getTileSize() + 'px';
            tile.galleryimg = 'no';

            tile.onselectstart = tile.onmousemove = L.Util.falseFn;

            if (L.Browser.ielt9 && this.options.opacity !== undefined) {
                L.DomUtil.setOpacity(tile, this.options.opacity);
            }
            // without this hack, tiles disappear after zoom on Chrome for Android
            // https://github.com/Leaflet/Leaflet/issues/2078
            if (L.Browser.mobileWebkit3d) {
                tile.style.WebkitBackfaceVisibility = 'hidden';
            }
            return tile;
        },

        _loadTile: function (tile, tilePoint) {
            tile._layer = this;
            tile.onload = this._tileOnLoad;
            tile.onerror = this._tileOnError;

            this._adjustTilePoint(tilePoint);
            tile.src = this.getTileUrl(tilePoint);

            this.fire('tileloadstart', {
                tile: tile,
                url: tile.src
            });
        },

        _tileLoaded: function () {
            this._tilesToLoad--;

            if (this._animated) {
                L.DomUtil.addClass(this._tileContainer, 'leaflet-zoom-animated');
            }

            if (!this._tilesToLoad) {
                this.fire('load');

                if (this._animated) {
                    // clear scaled tiles after all new tiles are loaded (for performance)
                    clearTimeout(this._clearBgBufferTimer);
                    this._clearBgBufferTimer = setTimeout(L.bind(this._clearBgBuffer, this), 500);
                }
            }
        },

        _tileOnLoad: function () {
            var layer = this._layer;

            //Only if we are loading an actual image
            if (this.src !== L.Util.emptyImageUrl) {
                L.DomUtil.addClass(this, 'leaflet-tile-loaded');

                layer.fire('tileload', {
                    tile: this,
                    url: this.src
                });
            }

            layer._tileLoaded();
        },

        _tileOnError: function () {
            var layer = this._layer;

            layer.fire('tileerror', {
                tile: this,
                url: this.src
            });

            var newUrl = layer.options.errorTileUrl;
            if (newUrl) {
                this.src = newUrl;
            }

            layer._tileLoaded();
        }
    });

    L.tileLayer = function (url, options) {
        return new L.TileLayer(url, options);
    };


    /*
     * L.TileLayer.WMS is used for putting WMS tile layers on the map.
     */

    L.TileLayer.WMS = L.TileLayer.extend({

        defaultWmsParams: {
            service: 'WMS',
            request: 'GetMap',
            version: '1.1.1',
            layers: '',
            styles: '',
            format: 'image/jpeg',
            transparent: false
        },

        initialize: function (url, options) { // (String, Object)

            this._url = url;

            var wmsParams = L.extend({}, this.defaultWmsParams),
                tileSize = options.tileSize || this.options.tileSize;

            if (options.detectRetina && L.Browser.retina) {
                wmsParams.width = wmsParams.height = tileSize * 2;
            } else {
                wmsParams.width = wmsParams.height = tileSize;
            }

            for (var i in options) {
                // all keys that are not TileLayer options go to WMS params
                if (!this.options.hasOwnProperty(i) && i !== 'crs') {
                    wmsParams[i] = options[i];
                }
            }

            this.wmsParams = wmsParams;

            L.setOptions(this, options);
        },

        onAdd: function (map) {

            this._crs = this.options.crs || map.options.crs;

            this._wmsVersion = parseFloat(this.wmsParams.version);

            var projectionKey = this._wmsVersion >= 1.3 ? 'crs' : 'srs';
            this.wmsParams[projectionKey] = this._crs.code;

            L.TileLayer.prototype.onAdd.call(this, map);
        },

        getTileUrl: function (tilePoint) { // (Point, Number) -> String

            var map = this._map,
                tileSize = this.options.tileSize,

                nwPoint = tilePoint.multiplyBy(tileSize),
                sePoint = nwPoint.add([tileSize, tileSize]),

                nw = this._crs.project(map.unproject(nwPoint, tilePoint.z)),
                se = this._crs.project(map.unproject(sePoint, tilePoint.z)),
                bbox = this._wmsVersion >= 1.3 && this._crs === L.CRS.EPSG4326 ?
                    [se.y, nw.x, nw.y, se.x].join(',') :
                    [nw.x, se.y, se.x, nw.y].join(','),

                url = L.Util.template(this._url, { s: this._getSubdomain(tilePoint) });

            return url + L.Util.getParamString(this.wmsParams, url, true) + '&BBOX=' + bbox;
        },

        setParams: function (params, noRedraw) {

            L.extend(this.wmsParams, params);

            if (!noRedraw) {
                this.redraw();
            }

            return this;
        }
    });

    L.tileLayer.wms = function (url, options) {
        return new L.TileLayer.WMS(url, options);
    };


    /*
     * L.TileLayer.Canvas is a class that you can use as a base for creating
     * dynamically drawn Canvas-based tile layers.
     */

    L.TileLayer.Canvas = L.TileLayer.extend({
        options: {
            async: false
        },

        initialize: function (options) {
            L.setOptions(this, options);
        },

        redraw: function () {
            if (this._map) {
                this._reset({ hard: true });
                this._update();
            }

            for (var i in this._tiles) {
                this._redrawTile(this._tiles[i]);
            }
            return this;
        },

        _redrawTile: function (tile) {
            this.drawTile(tile, tile._tilePoint, this._map._zoom);
        },

        _createTile: function () {
            var tile = L.DomUtil.create('canvas', 'leaflet-tile');
            tile.width = tile.height = this.options.tileSize;
            tile.onselectstart = tile.onmousemove = L.Util.falseFn;
            return tile;
        },

        _loadTile: function (tile, tilePoint) {
            tile._layer = this;
            tile._tilePoint = tilePoint;

            this._redrawTile(tile);

            if (!this.options.async) {
                this.tileDrawn(tile);
            }
        },

        drawTile: function (/*tile, tilePoint*/) {
            // override with rendering code
        },

        tileDrawn: function (tile) {
            this._tileOnLoad.call(tile);
        }
    });


    L.tileLayer.canvas = function (options) {
        return new L.TileLayer.Canvas(options);
    };


    /*
     * L.ImageOverlay is used to overlay images over the map (to specific geographical bounds).
     */

    L.ImageOverlay = L.Class.extend({
        includes: L.Mixin.Events,

        options: {
            opacity: 1,
            zIndex: -1
        },

        initialize: function (url, bounds, options) { // (String, LatLngBounds, Object)
            this._url = url;
            this._bounds = L.latLngBounds(bounds);
            L.setOptions(this, options);
        },

        onAdd: function (map) {
            this._map = map;

            if (!this._image) {
                this._initImage();
            }
            /*
            *修改说明：使切图和矢量图层的顺序可以调整
            *修改影响：TileLayer类也有修改
            *修改时间：2015/8/6
            *注释说明：注释代码为库原有代码（勿删）
            */
            //=======================================================
            //map._panes.overlayPane.appendChild(this._image);
            map._panes.overlayPane.insertBefore(
                this._image, map._panes.overlayPane.firstChild);
            //=======================================================

            map.on('viewreset', this._reset, this);

            if (map.options.zoomAnimation && L.Browser.any3d) {
                map.on('zoomanim', this._animateZoom, this);
            }

            this._reset();
        },

        onRemove: function (map) {
            map.getPanes().overlayPane.removeChild(this._image);

            map.off('viewreset', this._reset, this);

            if (map.options.zoomAnimation) {
                map.off('zoomanim', this._animateZoom, this);
            }
        },

        addTo: function (map) {
            map.addLayer(this);
            return this;
        },

        setOpacity: function (opacity) {
            this.options.opacity = opacity;
            this._updateOpacity();
            return this;
        },

        // TODO remove bringToFront/bringToBack duplication from TileLayer/Path
        bringToFront: function () {
            if (this._image) {
                this._map._panes.overlayPane.appendChild(this._image);
            }
            return this;
        },

        bringToBack: function () {
            var pane = this._map._panes.overlayPane;
            if (this._image) {
                pane.insertBefore(this._image, pane.firstChild);
            }
            return this;
        },

        setUrl: function (url) {
            this._url = url;
            this._image.src = this._url;
        },

        getAttribution: function () {
            return this.options.attribution;
        },

        _initImage: function () {
            if(this._image==null)
                this._image = L.DomUtil.create('img', 'leaflet-image-layer');

            if (this._map.options.zoomAnimation && L.Browser.any3d) {
                L.DomUtil.addClass(this._image, 'leaflet-zoom-animated');
            } else {
                L.DomUtil.addClass(this._image, 'leaflet-zoom-hide');
            }
            /*
            *修改说明：为调整图层的顺序
            *修改影响：TileLayer类也有修改
            *修改时间：2015/8/6
            */
            //==========矢量图默认的zIndex为overlayPane的所有子节点数=========================
            //如果没有第一次创建图层，zIndex设置为整个overlayPane的最后一个
            //如果是因为缩放时的创建图层，zIndex设置为传过来的之前的图层zIndex
            if (this.options.zIndex == -1) {
                this._image.style.zIndex = this._map._panes.overlayPane.childNodes.length;
                this.options.zIndex = this._map._panes.overlayPane.childNodes.length;
            } else {
                this._image.style.zIndex = this.options.zIndex;
            }
            //this._updateOpacity();
            //==============================================================================

            //TODO createImage util method to remove duplication
            L.extend(this._image, {
                galleryimg: 'no',
                onselectstart: L.Util.falseFn,
                onmousemove: L.Util.falseFn,
                onload: L.bind(this._onImageLoad, this),
                src: this._url
            });
        },

        _animateZoom: function (e) {
            //var map = this._map,
            //    image = this._image,
            //    scale = map.getZoomScale(e.zoom),
            //    nw = this._bounds.getNorthWest(),
            //    se = this._bounds.getSouthEast(),

            //    topLeft = map._latLngToNewLayerPoint(nw, e.zoom, e.center),
            //    size = map._latLngToNewLayerPoint(se, e.zoom, e.center)._subtract(topLeft),
            //    origin = topLeft._add(size._multiplyBy((1 / 2) * (1 - 1 / scale)));

            //image.style[L.DomUtil.TRANSFORM] =
            //        L.DomUtil.getTranslateString(origin) + ' scale(' + scale + ') ';

            /*
            修改人：付友强
            修改时间：2016/7/4
            修改原因：修正叠加动态图偏移情况
            */

            //====================================
            var map = this._map,
                image = this._image,
                mapPanePos = map._getMapPanePos(),
                imagePos = this._imagePos,
                scale = e.scale,
                origin = e.origin.add(mapPanePos);

            var r = this._size.divideBy(2);

            var ofs = origin.subtract(imagePos.add(mapPanePos));
            var offset = ofs.subtract(r).multiplyBy(scale - 1);
            var topteft = imagePos.subtract(offset);

            this._lastScale = scale;
            this._lastOrigin = topteft;

            image.style[L.DomUtil.TRANSFORM] =
                    L.DomUtil.getTranslateString(topteft) + ' scale(' + scale + ') ';
        },

        _reset: function () {
            //var image = this._image,
            //    topLeft = this._map.latLngToLayerPoint(this._bounds.getNorthWest()),
            //    size = this._map.latLngToLayerPoint(this._bounds.getSouthEast())._subtract(topLeft);

            //    L.DomUtil.setPosition(image, topLeft);

            //image.style.width = size.x + 'px';
            //image.style.height = size.y + 'px';

            /*
            修改人：付友强
            修改时间：2016/7/4
            修改原因：修正叠加动态图偏移情况
            */

            //====================================
            var image = this._image,
                offset, topLeft, size;

            if (!this._lastScale) {
                topLeft = this._map._getMapPanePos().multiplyBy(-1);

                this._size = this._map._size;
            } else {
                size = this._size.multiplyBy(this._lastScale);
                offset = size.subtract(this._size).divideBy(2);
                topLeft = this._lastOrigin.subtract(offset);

                this._size = size;
            }

            this._imagePos = topLeft;
            L.DomUtil.setPosition(image, topLeft);

            image.style.width = this._size.x + 'px';
            image.style.height = this._size.y + 'px';
        },

        _onImageLoad: function () {
            this.fire('load');
        },

        _updateOpacity: function () {
            L.DomUtil.setOpacity(this._image, this.options.opacity);
        }
    });

    L.imageOverlay = function (url, bounds, options) {
        return new L.ImageOverlay(url, bounds, options);
    };


    /*
     * L.Icon is an image-based icon class that you can use with L.Marker for custom markers.
     */

    L.Icon = L.Class.extend({
        options: {
            /*
            iconUrl: (String) (required)
            iconRetinaUrl: (String) (optional, used for retina devices if detected)
            iconSize: (Point) (can be set through CSS)
            iconAnchor: (Point) (centered by default, can be set in CSS with negative margins)
            popupAnchor: (Point) (if not specified, popup opens in the anchor point)
            shadowUrl: (String) (no shadow by default)
            shadowRetinaUrl: (String) (optional, used for retina devices if detected)
            shadowSize: (Point)
            shadowAnchor: (Point)
            */
            className: ''
        },

        initialize: function (options) {
            L.setOptions(this, options);
        },

        createIcon: function (oldIcon) {
            return this._createIcon('icon', oldIcon);
        },

        createShadow: function (oldIcon) {
            return this._createIcon('shadow', oldIcon);
        },

        _createIcon: function (name, oldIcon) {
            var src = this._getIconUrl(name);

            if (!src) {
                if (name === 'icon') {
                    throw new Error('iconUrl not set in Icon options (see the docs).');
                }
                return null;
            }

            var img;
            if (!oldIcon || oldIcon.tagName !== 'IMG') {
                img = this._createImg(src);
            } else {
                img = this._createImg(src, oldIcon);
            }
            this._setIconStyles(img, name);

            return img;
        },

        _setIconStyles: function (img, name) {
            var options = this.options,
                size = L.point(options[name + 'Size']),
                anchor;

            if (name === 'shadow') {
                anchor = L.point(options.shadowAnchor || options.iconAnchor);
            } else {
                anchor = L.point(options.iconAnchor);
            }

            if (!anchor && size) {
                anchor = size.divideBy(2, true);
            }

            img.className = 'leaflet-marker-' + name + ' ' + options.className;

            if (anchor) {
                img.style.marginLeft = (-anchor.x) + 'px';
                img.style.marginTop = (-anchor.y) + 'px';
            }

            if (size) {
                img.style.width = size.x + 'px';
                img.style.height = size.y + 'px';
            }
        },

        _createImg: function (src, el) {
            el = el || document.createElement('img');
            el.src = src;
            return el;
        },

        _getIconUrl: function (name) {
            if (L.Browser.retina && this.options[name + 'RetinaUrl']) {
                return this.options[name + 'RetinaUrl'];
            }
            return this.options[name + 'Url'];
        }
    });

    L.icon = function (options) {
        return new L.Icon(options);
    };


    /*
     * L.Icon.Default is the blue marker icon used by default in Leaflet.
     */

    L.Icon.Default = L.Icon.extend({

        options: {
            iconSize: [25, 41],
            iconAnchor: [12, 41],
            popupAnchor: [1, -34],

            shadowSize: [41, 41]
        },

        _getIconUrl: function (name) {
            var key = name + 'Url';

            if (this.options[key]) {
                return this.options[key];
            }

            if (L.Browser.retina && name === 'icon') {
                name += '-2x';
            }

            var path = L.Icon.Default.imagePath;

            if (!path) {
                throw new Error('Couldn\'t autodetect L.Icon.Default.imagePath, set it manually.');
            }

            return path + '/marker-' + name + '.png';
        }
    });

    L.Icon.Default.imagePath = (function () {
        var scripts = document.getElementsByTagName('script'),
            leafletRe = /[\/^]leaflet[\-\._]?([\w\-\._]*)\.js\??/;

        var i, len, src, matches, path;

        for (i = 0, len = scripts.length; i < len; i++) {
            src = scripts[i].src;
            matches = src.match(leafletRe);

            if (matches) {
                path = src.split(leafletRe)[0];
                return (path ? path + '/' : '') + 'images';
            }
        }
    }());


    /*
     * L.Marker is used to display clickable/draggable icons on the map.
     */

    L.Marker = L.Class.extend({

        includes: L.Mixin.Events,

        options: {
            icon: new L.Icon.Default(),
            title: '',
            alt: '',
            clickable: true,
            draggable: false,
            keyboard: true,
            zIndexOffset: 0,
            opacity: 1,
            riseOnHover: false,
            riseOffset: 250
        },

        initialize: function (latlng, options) {
            L.setOptions(this, options);
            this._latlng = L.latLng(latlng);
        },

        onAdd: function (map) {
            this._map = map;

            map.on('viewreset', this.update, this);

            this._initIcon();
            this.update();
            this.fire('add');

            if (map.options.zoomAnimation && map.options.markerZoomAnimation) {
                map.on('zoomanim', this._animateZoom, this);
            }
        },

        addTo: function (map) {
            map.addLayer(this);
            return this;
        },

        onRemove: function (map) {
            if (this.dragging) {
                this.dragging.disable();
            }

            this._removeIcon();
            this._removeShadow();

            this.fire('remove');

            map.off({
                'viewreset': this.update,
                'zoomanim': this._animateZoom
            }, this);

            this._map = null;
        },

        getLatLng: function () {
            return this._latlng;
        },

        setLatLng: function (latlng) {
            this._latlng = L.latLng(latlng);

            this.update();

            return this.fire('move', { latlng: this._latlng });
        },

        setZIndexOffset: function (offset) {
            this.options.zIndexOffset = offset;
            this.update();

            return this;
        },

        setIcon: function (icon) {

            this.options.icon = icon;

            if (this._map) {
                this._initIcon();
                this.update();
            }

            if (this._popup) {
                this.bindPopup(this._popup);
            }

            return this;
        },

        update: function () {
            if (this._icon) {
                var pos = this._map.latLngToLayerPoint(this._latlng).round();
                this._setPos(pos);
            }

            return this;
        },

        _initIcon: function () {
            var options = this.options,
                map = this._map,
                animation = (map.options.zoomAnimation && map.options.markerZoomAnimation),
                classToAdd = animation ? 'leaflet-zoom-animated' : 'leaflet-zoom-hide';

            var icon = options.icon.createIcon(this._icon),
                addIcon = false;

            // if we're not reusing the icon, remove the old one and init new one
            if (icon !== this._icon) {
                if (this._icon) {
                    this._removeIcon();
                }
                addIcon = true;

                if (options.title) {
                    icon.title = options.title;
                }

                if (options.alt) {
                    icon.alt = options.alt;
                }
            }

            L.DomUtil.addClass(icon, classToAdd);

            if (options.keyboard) {
                icon.tabIndex = '0';
            }

            this._icon = icon;

            this._initInteraction();

            if (options.riseOnHover) {
                L.DomEvent
                    .on(icon, 'mouseover', this._bringToFront, this)
                    .on(icon, 'mouseout', this._resetZIndex, this);
            }

            var newShadow = options.icon.createShadow(this._shadow),
                addShadow = false;

            if (newShadow !== this._shadow) {
                this._removeShadow();
                addShadow = true;
            }

            if (newShadow) {
                L.DomUtil.addClass(newShadow, classToAdd);
            }
            this._shadow = newShadow;


            if (options.opacity < 1) {
                this._updateOpacity();
            }


            var panes = this._map._panes;

            if (addIcon) {
                panes.markerPane.appendChild(this._icon);
            }

            if (newShadow && addShadow) {
                panes.shadowPane.appendChild(this._shadow);
            }
        },

        _removeIcon: function () {
            if (this.options.riseOnHover) {
                L.DomEvent
                    .off(this._icon, 'mouseover', this._bringToFront)
                    .off(this._icon, 'mouseout', this._resetZIndex);
            }

            this._map._panes.markerPane.removeChild(this._icon);

            this._icon = null;
        },

        _removeShadow: function () {
            if (this._shadow) {
                this._map._panes.shadowPane.removeChild(this._shadow);
            }
            this._shadow = null;
        },

        _setPos: function (pos) {
            L.DomUtil.setPosition(this._icon, pos);

            if (this._shadow) {
                L.DomUtil.setPosition(this._shadow, pos);
            }

            this._zIndex = pos.y + this.options.zIndexOffset;

            this._resetZIndex();
        },

        _updateZIndex: function (offset) {
            this._icon.style.zIndex = this._zIndex + offset;
        },

        _animateZoom: function (opt) {
            var pos = this._map._latLngToNewLayerPoint(this._latlng, opt.zoom, opt.center).round();

            this._setPos(pos);
        },

        _initInteraction: function () {

            if (!this.options.clickable) { return; }

            // TODO refactor into something shared with Map/Path/etc. to DRY it up

            var icon = this._icon,
                events = ['dblclick', 'mousedown', 'mouseover', 'mouseout', 'contextmenu'];

            L.DomUtil.addClass(icon, 'leaflet-clickable');
            L.DomEvent.on(icon, 'click', this._onMouseClick, this);
            L.DomEvent.on(icon, 'keypress', this._onKeyPress, this);

            for (var i = 0; i < events.length; i++) {
                L.DomEvent.on(icon, events[i], this._fireMouseEvent, this);
            }

            if (L.Handler.MarkerDrag) {
                this.dragging = new L.Handler.MarkerDrag(this);

                if (this.options.draggable) {
                    this.dragging.enable();
                }
            }
        },

        _onMouseClick: function (e) {
            var wasDragged = this.dragging && this.dragging.moved();

            if (this.hasEventListeners(e.type) || wasDragged) {
                L.DomEvent.stopPropagation(e);
            }

            if (wasDragged) { return; }

            if ((!this.dragging || !this.dragging._enabled) && this._map.dragging && this._map.dragging.moved()) { return; }

            this.fire(e.type, {
                originalEvent: e,
                latlng: this._latlng
            });
        },

        _onKeyPress: function (e) {
            if (e.keyCode === 13) {
                this.fire('click', {
                    originalEvent: e,
                    latlng: this._latlng
                });
            }
        },

        _fireMouseEvent: function (e) {

            this.fire(e.type, {
                originalEvent: e,
                latlng: this._latlng
            });

            // TODO proper custom event propagation
            // this line will always be called if marker is in a FeatureGroup
            if (e.type === 'contextmenu' && this.hasEventListeners(e.type)) {
                L.DomEvent.preventDefault(e);
            }
            if (e.type !== 'mousedown') {
                L.DomEvent.stopPropagation(e);
            } else {
                L.DomEvent.preventDefault(e);
            }
        },

        setOpacity: function (opacity) {
            this.options.opacity = opacity;
            if (this._map) {
                this._updateOpacity();
            }

            return this;
        },

        _updateOpacity: function () {
            L.DomUtil.setOpacity(this._icon, this.options.opacity);
            if (this._shadow) {
                L.DomUtil.setOpacity(this._shadow, this.options.opacity);
            }
        },

        _bringToFront: function () {
            this._updateZIndex(this.options.riseOffset);
        },

        _resetZIndex: function () {
            this._updateZIndex(0);
        }
    });

    L.marker = function (latlng, options) {
        return new L.Marker(latlng, options);
    };


    /*
     * L.DivIcon is a lightweight HTML-based icon class (as opposed to the image-based L.Icon)
     * to use with L.Marker.
     */

    L.DivIcon = L.Icon.extend({
        options: {
            iconSize: [12, 12], // also can be set through CSS
            /*
            iconAnchor: (Point)
            popupAnchor: (Point)
            html: (String)
            bgPos: (Point)
            */
            className: 'leaflet-div-icon',
            html: false
        },

        createIcon: function (oldIcon) {
            var div = (oldIcon && oldIcon.tagName === 'DIV') ? oldIcon : document.createElement('div'),
                options = this.options;

            if (options.html !== false) {
                div.innerHTML = options.html;
            } else {
                div.innerHTML = '';
            }

            if (options.bgPos) {
                div.style.backgroundPosition =
                        (-options.bgPos.x) + 'px ' + (-options.bgPos.y) + 'px';
            }

            this._setIconStyles(div, 'icon');
            return div;
        },

        createShadow: function () {
            return null;
        }
    });

    L.divIcon = function (options) {
        return new L.DivIcon(options);
    };


    /*
     * L.Popup is used for displaying popups on the map.
     */

    L.Map.mergeOptions({
        closePopupOnClick: true
    });

    L.Popup = L.Class.extend({
        includes: L.Mixin.Events,

        options: {
            minWidth: 50,
            maxWidth: 300,
            // maxHeight: null,
            autoPan: true,
            closeButton: true,
            offset: [0, 7],
            autoPanPadding: [5, 5],
            // autoPanPaddingTopLeft: null,
            // autoPanPaddingBottomRight: null,
            keepInView: false,
            className: '',
            zoomAnimation: true
        },

        initialize: function (options, source) {
            L.setOptions(this, options);

            this._source = source;
            this._animated = L.Browser.any3d && this.options.zoomAnimation;
            this._isOpen = false;
        },

        onAdd: function (map) {
            this._map = map;

            if (!this._container) {
                this._initLayout();
            }

            var animFade = map.options.fadeAnimation;

            if (animFade) {
                L.DomUtil.setOpacity(this._container, 0);
            }
            map._panes.popupPane.appendChild(this._container);

            map.on(this._getEvents(), this);

            this.update();

            if (animFade) {
                L.DomUtil.setOpacity(this._container, 1);
            }

            this.fire('open');

            map.fire('popupopen', { popup: this });

            if (this._source) {
                this._source.fire('popupopen', { popup: this });
            }
        },

        addTo: function (map) {
            map.addLayer(this);
            return this;
        },

        openOn: function (map) {
            map.openPopup(this);
            return this;
        },

        onRemove: function (map) {
            map._panes.popupPane.removeChild(this._container);

            L.Util.falseFn(this._container.offsetWidth); // force reflow

            map.off(this._getEvents(), this);

            if (map.options.fadeAnimation) {
                L.DomUtil.setOpacity(this._container, 0);
            }

            this._map = null;

            this.fire('close');

            map.fire('popupclose', { popup: this });

            if (this._source) {
                this._source.fire('popupclose', { popup: this });
            }
        },

        getLatLng: function () {
            return this._latlng;
        },

        setLatLng: function (latlng) {
            this._latlng = L.latLng(latlng);
            if (this._map) {
                this._updatePosition();
                this._adjustPan();
            }
            return this;
        },

        getContent: function () {
            return this._content;
        },

        setContent: function (content) {
            this._content = content;
            this.update();
            return this;
        },

        update: function () {
            if (!this._map) { return; }

            this._container.style.visibility = 'hidden';

            this._updateContent();
            this._updateLayout();
            this._updatePosition();

            this._container.style.visibility = '';

            this._adjustPan();
        },

        _getEvents: function () {
            var events = {
                viewreset: this._updatePosition
            };

            if (this._animated) {
                events.zoomanim = this._zoomAnimation;
            }
            if ('closeOnClick' in this.options ? this.options.closeOnClick : this._map.options.closePopupOnClick) {
                events.preclick = this._close;
            }
            if (this.options.keepInView) {
                events.moveend = this._adjustPan;
            }

            return events;
        },

        _close: function () {
            if (this._map) {
                this._map.closePopup(this);
            }
        },

        _initLayout: function () {
            var prefix = 'leaflet-popup',
                containerClass = prefix + ' ' + this.options.className + ' leaflet-zoom-' +
                        (this._animated ? 'animated' : 'hide'),
                container = this._container = L.DomUtil.create('div', containerClass),
                closeButton;

            if (this.options.closeButton) {
                closeButton = this._closeButton =
                        L.DomUtil.create('a', prefix + '-close-button', container);
                closeButton.href = '#close';
                closeButton.innerHTML = '&#215;';
                L.DomEvent.disableClickPropagation(closeButton);

                L.DomEvent.on(closeButton, 'click', this._onCloseButtonClick, this);
            }

            var wrapper = this._wrapper =
                    L.DomUtil.create('div', prefix + '-content-wrapper', container);
            L.DomEvent.disableClickPropagation(wrapper);

            this._contentNode = L.DomUtil.create('div', prefix + '-content', wrapper);

            L.DomEvent.disableScrollPropagation(this._contentNode);
            L.DomEvent.on(wrapper, 'contextmenu', L.DomEvent.stopPropagation);

            this._tipContainer = L.DomUtil.create('div', prefix + '-tip-container', container);
            this._tip = L.DomUtil.create('div', prefix + '-tip', this._tipContainer);
        },

        _updateContent: function () {
            if (!this._content) { return; }

            if (typeof this._content === 'string') {
                this._contentNode.innerHTML = this._content;
            } else {
                while (this._contentNode.hasChildNodes()) {
                    this._contentNode.removeChild(this._contentNode.firstChild);
                }
                this._contentNode.appendChild(this._content);
            }
            this.fire('contentupdate');
        },

        _updateLayout: function () {
            var container = this._contentNode,
                style = container.style;

            style.width = '';
            style.whiteSpace = 'nowrap';

            var width = container.offsetWidth;
            width = Math.min(width, this.options.maxWidth);
            width = Math.max(width, this.options.minWidth);

            style.width = (width + 1) + 'px';
            style.whiteSpace = '';

            style.height = '';

            var height = container.offsetHeight,
                maxHeight = this.options.maxHeight,
                scrolledClass = 'leaflet-popup-scrolled';

            if (maxHeight && height > maxHeight) {
                style.height = maxHeight + 'px';
                L.DomUtil.addClass(container, scrolledClass);
            } else {
                L.DomUtil.removeClass(container, scrolledClass);
            }

            this._containerWidth = this._container.offsetWidth;
        },

        _updatePosition: function () {
            if (!this._map) { return; }

            var pos = this._map.latLngToLayerPoint(this._latlng),
                animated = this._animated,
                offset = L.point(this.options.offset);

            if (animated) {
                L.DomUtil.setPosition(this._container, pos);
            }

            this._containerBottom = -offset.y - (animated ? 0 : pos.y);
            this._containerLeft = -Math.round(this._containerWidth / 2) + offset.x + (animated ? 0 : pos.x);

            // bottom position the popup in case the height of the popup changes (images loading etc)
            this._container.style.bottom = this._containerBottom + 'px';
            this._container.style.left = this._containerLeft + 'px';
        },

        _zoomAnimation: function (opt) {
            var pos = this._map._latLngToNewLayerPoint(this._latlng, opt.zoom, opt.center);

            L.DomUtil.setPosition(this._container, pos);
        },

        _adjustPan: function () {
            if (!this.options.autoPan) { return; }

            var map = this._map,
                containerHeight = this._container.offsetHeight,
                containerWidth = this._containerWidth,

                layerPos = new L.Point(this._containerLeft, -containerHeight - this._containerBottom);

            if (this._animated) {
                layerPos._add(L.DomUtil.getPosition(this._container));
            }

            var containerPos = map.layerPointToContainerPoint(layerPos),
                padding = L.point(this.options.autoPanPadding),
                paddingTL = L.point(this.options.autoPanPaddingTopLeft || padding),
                paddingBR = L.point(this.options.autoPanPaddingBottomRight || padding),
                size = map.getSize(),
                dx = 0,
                dy = 0;

            if (containerPos.x + containerWidth + paddingBR.x > size.x) { // right
                dx = containerPos.x + containerWidth - size.x + paddingBR.x;
            }
            if (containerPos.x - dx - paddingTL.x < 0) { // left
                dx = containerPos.x - paddingTL.x;
            }
            if (containerPos.y + containerHeight + paddingBR.y > size.y) { // bottom
                dy = containerPos.y + containerHeight - size.y + paddingBR.y;
            }
            if (containerPos.y - dy - paddingTL.y < 0) { // top
                dy = containerPos.y - paddingTL.y;
            }

            if (dx || dy) {
                map
                    .fire('autopanstart')
                    .panBy([dx, dy]);
            }
        },

        _onCloseButtonClick: function (e) {
            this._close();
            L.DomEvent.stop(e);
        }
    });

    L.popup = function (options, source) {
        return new L.Popup(options, source);
    };


    L.Map.include({
        openPopup: function (popup, latlng, options) { // (Popup) or (String || HTMLElement, LatLng[, Object])
            this.closePopup();

            if (!(popup instanceof L.Popup)) {
                var content = popup;

                popup = new L.Popup(options)
                    .setLatLng(latlng)
                    .setContent(content);
            }
            popup._isOpen = true;

            this._popup = popup;
            return this.addLayer(popup);
        },

        closePopup: function (popup) {
            if (!popup || popup === this._popup) {
                popup = this._popup;
                this._popup = null;
            }
            if (popup) {
                this.removeLayer(popup);
                popup._isOpen = false;
            }
            return this;
        }
    });


    /*
     * Popup extension to L.Marker, adding popup-related methods.
     */

    L.Marker.include({
        openPopup: function () {
            if (this._popup && this._map && !this._map.hasLayer(this._popup)) {
                this._popup.setLatLng(this._latlng);
                this._map.openPopup(this._popup);
            }

            return this;
        },

        closePopup: function () {
            if (this._popup) {
                this._popup._close();
            }
            return this;
        },

        togglePopup: function () {
            if (this._popup) {
                if (this._popup._isOpen) {
                    this.closePopup();
                } else {
                    this.openPopup();
                }
            }
            return this;
        },

        bindPopup: function (content, options) {
            var anchor = L.point(this.options.icon.options.popupAnchor || [0, 0]);

            anchor = anchor.add(L.Popup.prototype.options.offset);

            if (options && options.offset) {
                anchor = anchor.add(options.offset);
            }

            options = L.extend({ offset: anchor }, options);

            if (!this._popupHandlersAdded) {
                this
                    .on('click', this.togglePopup, this)
                    .on('remove', this.closePopup, this)
                    .on('move', this._movePopup, this);
                this._popupHandlersAdded = true;
            }

            if (content instanceof L.Popup) {
                L.setOptions(content, options);
                this._popup = content;
            } else {
                this._popup = new L.Popup(options, this)
                    .setContent(content);
            }

            return this;
        },

        setPopupContent: function (content) {
            if (this._popup) {
                this._popup.setContent(content);
            }
            return this;
        },

        unbindPopup: function () {
            if (this._popup) {
                this._popup = null;
                this
                    .off('click', this.togglePopup, this)
                    .off('remove', this.closePopup, this)
                    .off('move', this._movePopup, this);
                this._popupHandlersAdded = false;
            }
            return this;
        },

        getPopup: function () {
            return this._popup;
        },

        _movePopup: function (e) {
            this._popup.setLatLng(e.latlng);
        }
    });


    /*
     * L.LayerGroup is a class to combine several layers into one so that
     * you can manipulate the group (e.g. add/remove it) as one layer.
     */

    L.LayerGroup = L.Class.extend({
        initialize: function (layers) {
            this._layers = {};

            var i, len;

            if (layers) {
                for (i = 0, len = layers.length; i < len; i++) {
                    this.addLayer(layers[i]);
                }
            }
        },

        addLayer: function (layer) {
            var id = this.getLayerId(layer);

            this._layers[id] = layer;

            if (this._map) {
                this._map.addLayer(layer);
            }

            return this;
        },

        removeLayer: function (layer) {
            var id = layer in this._layers ? layer : this.getLayerId(layer);

            if (this._map && this._layers[id]) {
                this._map.removeLayer(this._layers[id]);
            }

            delete this._layers[id];

            return this;
        },

        hasLayer: function (layer) {
            if (!layer) { return false; }

            return (layer in this._layers || this.getLayerId(layer) in this._layers);
        },

        clearLayers: function () {
            this.eachLayer(this.removeLayer, this);
            return this;
        },

        invoke: function (methodName) {
            var args = Array.prototype.slice.call(arguments, 1),
                i, layer;

            for (i in this._layers) {
                layer = this._layers[i];

                if (layer[methodName]) {
                    layer[methodName].apply(layer, args);
                }
            }

            return this;
        },

        onAdd: function (map) {
            this._map = map;
            this.eachLayer(map.addLayer, map);
        },

        onRemove: function (map) {
            this.eachLayer(map.removeLayer, map);
            this._map = null;
        },

        addTo: function (map) {
            map.addLayer(this);
            return this;
        },

        eachLayer: function (method, context) {
            for (var i in this._layers) {
                method.call(context, this._layers[i]);
            }
            return this;
        },

        getLayer: function (id) {
            return this._layers[id];
        },

        getLayers: function () {
            var layers = [];

            for (var i in this._layers) {
                layers.push(this._layers[i]);
            }
            return layers;
        },

        setZIndex: function (zIndex) {
            return this.invoke('setZIndex', zIndex);
        },

        getLayerId: function (layer) {
            return L.stamp(layer);
        }
    });

    L.layerGroup = function (layers) {
        return new L.LayerGroup(layers);
    };


    /*
     * L.FeatureGroup extends L.LayerGroup by introducing mouse events and additional methods
     * shared between a group of interactive layers (like vectors or markers).
     */

    L.FeatureGroup = L.LayerGroup.extend({
        includes: L.Mixin.Events,

        statics: {
            EVENTS: 'click dblclick mouseover mouseout mousemove contextmenu popupopen popupclose'
        },

        addLayer: function (layer) {
            if (this.hasLayer(layer)) {
                return this;
            }

            if ('on' in layer) {
                layer.on(L.FeatureGroup.EVENTS, this._propagateEvent, this);
            }

            L.LayerGroup.prototype.addLayer.call(this, layer);

            if (this._popupContent && layer.bindPopup) {
                layer.bindPopup(this._popupContent, this._popupOptions);
            }

            return this.fire('layeradd', { layer: layer });
        },

        removeLayer: function (layer) {
            if (!this.hasLayer(layer)) {
                return this;
            }
            if (layer in this._layers) {
                layer = this._layers[layer];
            }

            layer.off(L.FeatureGroup.EVENTS, this._propagateEvent, this);

            L.LayerGroup.prototype.removeLayer.call(this, layer);

            if (this._popupContent) {
                this.invoke('unbindPopup');
            }

            return this.fire('layerremove', { layer: layer });
        },

        bindPopup: function (content, options) {
            this._popupContent = content;
            this._popupOptions = options;
            return this.invoke('bindPopup', content, options);
        },

        openPopup: function (latlng) {
            // open popup on the first layer
            for (var id in this._layers) {
                this._layers[id].openPopup(latlng);
                break;
            }
            return this;
        },

        setStyle: function (style) {
            return this.invoke('setStyle', style);
        },

        bringToFront: function () {
            return this.invoke('bringToFront');
        },

        bringToBack: function () {
            return this.invoke('bringToBack');
        },

        getBounds: function () {
            var bounds = new L.LatLngBounds();

            this.eachLayer(function (layer) {
                bounds.extend(layer instanceof L.Marker ? layer.getLatLng() : layer.getBounds());
            });

            return bounds;
        },

        _propagateEvent: function (e) {
            e = L.extend({
                layer: e.target,
                target: this
            }, e);
            this.fire(e.type, e);
        }
    });

    L.featureGroup = function (layers) {
        return new L.FeatureGroup(layers);
    };


    /*
     * L.Path is a base class for rendering vector paths on a map. Inherited by Polyline, Circle, etc.
     */

    L.Path = L.Class.extend({
        includes: [L.Mixin.Events],

        statics: {
            // how much to extend the clip area around the map view
            // (relative to its size, e.g. 0.5 is half the screen in each direction)
            // set it so that SVG element doesn't exceed 1280px (vectors flicker on dragend if it is)
            CLIP_PADDING: (function () {
                var max = L.Browser.mobile ? 1280 : 2000,
                    target = (max / Math.max(window.outerWidth, window.outerHeight) - 1) / 2;
                return Math.max(0, Math.min(0.5, target));
            })()
        },

        options: {
            stroke: true,
            color: '#0033ff',
            dashArray: null,
            lineCap: null,
            lineJoin: null,
            weight: 5,
            opacity: 0.5,

            fill: false,
            fillColor: null, //same as color by default
            fillOpacity: 0.2,

            clickable: true
        },

        initialize: function (options) {
            L.setOptions(this, options);
        },

        onAdd: function (map) {
            this._map = map;

            if (!this._container) {
                this._initElements();
                this._initEvents();
            }

            this.projectLatlngs();
            this._updatePath();

            if (this._container) {
                this._map._pathRoot.appendChild(this._container);
            }

            this.fire('add');

            map.on({
                'viewreset': this.projectLatlngs,
                'moveend': this._updatePath
            }, this);
        },

        addTo: function (map) {
            map.addLayer(this);
            return this;
        },

        onRemove: function (map) {
            map._pathRoot.removeChild(this._container);

            // Need to fire remove event before we set _map to null as the event hooks might need the object
            this.fire('remove');
            this._map = null;

            if (L.Browser.vml) {
                this._container = null;
                this._stroke = null;
                this._fill = null;
            }

            map.off({
                'viewreset': this.projectLatlngs,
                'moveend': this._updatePath
            }, this);
        },

        projectLatlngs: function () {
            // do all projection stuff here
        },

        setStyle: function (style) {
            L.setOptions(this, style);

            if (this._container) {
                this._updateStyle();
            }

            return this;
        },

        redraw: function () {
            if (this._map) {
                this.projectLatlngs();
                this._updatePath();
            }
            return this;
        }
    });

    L.Map.include({
        _updatePathViewport: function () {
            var p = L.Path.CLIP_PADDING,
                size = this.getSize(),
                panePos = L.DomUtil.getPosition(this._mapPane),
                min = panePos.multiplyBy(-1)._subtract(size.multiplyBy(p)._round()),
                max = min.add(size.multiplyBy(1 + p * 2)._round());

            this._pathViewport = new L.Bounds(min, max);
        }
    });


    /*
     * Extends L.Path with SVG-specific rendering code.
     */

    L.Path.SVG_NS = 'http://www.w3.org/2000/svg';

    L.Browser.svg = !!(document.createElementNS && document.createElementNS(L.Path.SVG_NS, 'svg').createSVGRect);

    L.Path = L.Path.extend({
        statics: {
            SVG: L.Browser.svg
        },

        bringToFront: function () {
            var root = this._map._pathRoot,
                path = this._container;

            if (path && root.lastChild !== path) {
                root.appendChild(path);
            }
            return this;
        },

        bringToBack: function () {
            var root = this._map._pathRoot,
                path = this._container,
                first = root.firstChild;

            if (path && first !== path) {
                root.insertBefore(path, first);
            }
            return this;
        },

        getPathString: function () {
            // form path string here
        },

        _createElement: function (name) {
            return document.createElementNS(L.Path.SVG_NS, name);
        },

        _initElements: function () {
            this._map._initPathRoot();
            this._initPath();
            this._initStyle();
        },

        _initPath: function () {
            this._container = this._createElement('g');

            this._path = this._createElement('path');

            if (this.options.className) {
                L.DomUtil.addClass(this._path, this.options.className);
            }

            this._container.appendChild(this._path);
        },

        _initStyle: function () {
            if (this.options.stroke) {
                this._path.setAttribute('stroke-linejoin', 'round');
                this._path.setAttribute('stroke-linecap', 'round');
            }
            if (this.options.fill) {
                this._path.setAttribute('fill-rule', 'evenodd');
            }
            if (this.options.pointerEvents) {
                this._path.setAttribute('pointer-events', this.options.pointerEvents);
            }
            if (!this.options.clickable && !this.options.pointerEvents) {
                this._path.setAttribute('pointer-events', 'none');
            }
            this._updateStyle();
        },

        _updateStyle: function () {
            if (this.options.stroke) {
                this._path.setAttribute('stroke', this.options.color);
                this._path.setAttribute('stroke-opacity', this.options.opacity);
                this._path.setAttribute('stroke-width', this.options.weight);
                if (this.options.dashArray) {
                    this._path.setAttribute('stroke-dasharray', this.options.dashArray);
                } else {
                    this._path.removeAttribute('stroke-dasharray');
                }
                if (this.options.lineCap) {
                    this._path.setAttribute('stroke-linecap', this.options.lineCap);
                }
                if (this.options.lineJoin) {
                    this._path.setAttribute('stroke-linejoin', this.options.lineJoin);
                }
            } else {
                this._path.setAttribute('stroke', 'none');
            }
            if (this.options.fill) {
                this._path.setAttribute('fill', this.options.fillColor || this.options.color);
                this._path.setAttribute('fill-opacity', this.options.fillOpacity);
            } else {
                this._path.setAttribute('fill', 'none');
            }
        },

        _updatePath: function () {
            var str = this.getPathString();
            if (!str) {
                // fix webkit empty string parsing bug
                str = 'M0 0';
            }
            this._path.setAttribute('d', str);
        },

        // TODO remove duplication with L.Map
        _initEvents: function () {
            if (this.options.clickable) {
                if (L.Browser.svg || !L.Browser.vml) {
                    L.DomUtil.addClass(this._path, 'leaflet-clickable');
                }

                L.DomEvent.on(this._container, 'click', this._onMouseClick, this);

                var events = ['dblclick', 'mousedown', 'mouseover',
                              'mouseout', 'mousemove', 'contextmenu'];
                for (var i = 0; i < events.length; i++) {
                    L.DomEvent.on(this._container, events[i], this._fireMouseEvent, this);
                }
            }
        },

        _onMouseClick: function (e) {
            if (this._map.dragging && this._map.dragging.moved()) { return; }

            this._fireMouseEvent(e);
        },

        _fireMouseEvent: function (e) {
            if (!this.hasEventListeners(e.type)) { return; }

            var map = this._map,
                containerPoint = map.mouseEventToContainerPoint(e),
                layerPoint = map.containerPointToLayerPoint(containerPoint),
                latlng = map.layerPointToLatLng(layerPoint);

            this.fire(e.type, {
                latlng: latlng,
                layerPoint: layerPoint,
                containerPoint: containerPoint,
                originalEvent: e
            });

            if (e.type === 'contextmenu') {
                L.DomEvent.preventDefault(e);
            }
            if (e.type !== 'mousemove') {
                L.DomEvent.stopPropagation(e);
            }
        }
    });

    L.Map.include({
        _initPathRoot: function () {
            if (!this._pathRoot) {
                this._pathRoot = L.Path.prototype._createElement('svg');
                this._panes.overlayPane.appendChild(this._pathRoot);

                if (this.options.zoomAnimation && L.Browser.any3d) {
                    L.DomUtil.addClass(this._pathRoot, 'leaflet-zoom-animated');

                    this.on({
                        'zoomanim': this._animatePathZoom,
                        'zoomend': this._endPathZoom
                    });
                } else {
                    L.DomUtil.addClass(this._pathRoot, 'leaflet-zoom-hide');
                }

                this.on('moveend', this._updateSvgViewport);
                this._updateSvgViewport();
            }
        },

        _animatePathZoom: function (e) {
            var scale = this.getZoomScale(e.zoom),
                offset = this._getCenterOffset(e.center)._multiplyBy(-scale)._add(this._pathViewport.min);

            this._pathRoot.style[L.DomUtil.TRANSFORM] =
                    L.DomUtil.getTranslateString(offset) + ' scale(' + scale + ') ';

            this._pathZooming = true;
        },

        _endPathZoom: function () {
            this._pathZooming = false;
        },

        _updateSvgViewport: function () {

            if (this._pathZooming) {
                // Do not update SVGs while a zoom animation is going on otherwise the animation will break.
                // When the zoom animation ends we will be updated again anyway
                // This fixes the case where you do a momentum move and zoom while the move is still ongoing.
                return;
            }

            this._updatePathViewport();

            var vp = this._pathViewport,
                min = vp.min,
                max = vp.max,
                width = max.x - min.x,
                height = max.y - min.y,
                root = this._pathRoot,
                pane = this._panes.overlayPane;

            // Hack to make flicker on drag end on mobile webkit less irritating
            if (L.Browser.mobileWebkit) {
                pane.removeChild(root);
            }

            L.DomUtil.setPosition(root, min);
            root.setAttribute('width', width);
            root.setAttribute('height', height);
            root.setAttribute('viewBox', [min.x, min.y, width, height].join(' '));

            if (L.Browser.mobileWebkit) {
                pane.appendChild(root);
            }
        }
    });


    /*
     * Popup extension to L.Path (polylines, polygons, circles), adding popup-related methods.
     */

    L.Path.include({

        bindPopup: function (content, options) {

            if (content instanceof L.Popup) {
                this._popup = content;
            } else {
                if (!this._popup || options) {
                    this._popup = new L.Popup(options, this);
                }
                this._popup.setContent(content);
            }

            if (!this._popupHandlersAdded) {
                this
                    .on('click', this._openPopup, this)
                    .on('remove', this.closePopup, this);

                this._popupHandlersAdded = true;
            }

            return this;
        },

        unbindPopup: function () {
            if (this._popup) {
                this._popup = null;
                this
                    .off('click', this._openPopup)
                    .off('remove', this.closePopup);

                this._popupHandlersAdded = false;
            }
            return this;
        },

        openPopup: function (latlng) {

            if (this._popup) {
                // open the popup from one of the path's points if not specified
                latlng = latlng || this._latlng ||
                         this._latlngs[Math.floor(this._latlngs.length / 2)];

                this._openPopup({ latlng: latlng });
            }

            return this;
        },

        closePopup: function () {
            if (this._popup) {
                this._popup._close();
            }
            return this;
        },

        _openPopup: function (e) {
            this._popup.setLatLng(e.latlng);
            this._map.openPopup(this._popup);
        }
    });


    /*
     * Vector rendering for IE6-8 through VML.
     * Thanks to Dmitry Baranovsky and his Raphael library for inspiration!
     */

    L.Browser.vml = !L.Browser.svg && (function () {
        try {
            var div = document.createElement('div');
            div.innerHTML = '<v:shape adj="1"/>';

            var shape = div.firstChild;
            shape.style.behavior = 'url(#default#VML)';

            return shape && (typeof shape.adj === 'object');

        } catch (e) {
            return false;
        }
    }());

    L.Path = L.Browser.svg || !L.Browser.vml ? L.Path : L.Path.extend({
        statics: {
            VML: true,
            CLIP_PADDING: 0.02
        },

        _createElement: (function () {
            try {
                document.namespaces.add('lvml', 'urn:schemas-microsoft-com:vml');
                return function (name) {
                    return document.createElement('<lvml:' + name + ' class="lvml">');
                };
            } catch (e) {
                return function (name) {
                    return document.createElement(
                            '<' + name + ' xmlns="urn:schemas-microsoft.com:vml" class="lvml">');
                };
            }
        }()),

        _initPath: function () {
            var container = this._container = this._createElement('shape');

            L.DomUtil.addClass(container, 'leaflet-vml-shape' +
                (this.options.className ? ' ' + this.options.className : ''));

            if (this.options.clickable) {
                L.DomUtil.addClass(container, 'leaflet-clickable');
            }

            container.coordsize = '1 1';

            this._path = this._createElement('path');
            container.appendChild(this._path);

            this._map._pathRoot.appendChild(container);
        },

        _initStyle: function () {
            this._updateStyle();
        },

        _updateStyle: function () {
            var stroke = this._stroke,
                fill = this._fill,
                options = this.options,
                container = this._container;

            container.stroked = options.stroke;
            container.filled = options.fill;

            if (options.stroke) {
                if (!stroke) {
                    stroke = this._stroke = this._createElement('stroke');
                    stroke.endcap = 'round';
                    container.appendChild(stroke);
                }
                stroke.weight = options.weight + 'px';
                stroke.color = options.color;
                stroke.opacity = options.opacity;

                if (options.dashArray) {
                    stroke.dashStyle = L.Util.isArray(options.dashArray) ?
                        options.dashArray.join(' ') :
                        options.dashArray.replace(/( *, *)/g, ' ');
                } else {
                    stroke.dashStyle = '';
                }
                if (options.lineCap) {
                    stroke.endcap = options.lineCap.replace('butt', 'flat');
                }
                if (options.lineJoin) {
                    stroke.joinstyle = options.lineJoin;
                }

            } else if (stroke) {
                container.removeChild(stroke);
                this._stroke = null;
            }

            if (options.fill) {
                if (!fill) {
                    fill = this._fill = this._createElement('fill');
                    container.appendChild(fill);
                }
                fill.color = options.fillColor || options.color;
                fill.opacity = options.fillOpacity;

            } else if (fill) {
                container.removeChild(fill);
                this._fill = null;
            }
        },

        _updatePath: function () {
            var style = this._container.style;

            style.display = 'none';
            this._path.v = this.getPathString() + ' '; // the space fixes IE empty path string bug
            style.display = '';
        }
    });

    L.Map.include(L.Browser.svg || !L.Browser.vml ? {} : {
        _initPathRoot: function () {
            if (this._pathRoot) { return; }

            var root = this._pathRoot = document.createElement('div');
            root.className = 'leaflet-vml-container';
            this._panes.overlayPane.appendChild(root);

            this.on('moveend', this._updatePathViewport);
            this._updatePathViewport();
        }
    });


    /*
     * Vector rendering for all browsers that support canvas.
     */

    L.Browser.canvas = (function () {
        return !!document.createElement('canvas').getContext;
    }());

    L.Path = (L.Path.SVG && !window.L_PREFER_CANVAS) || !L.Browser.canvas ? L.Path : L.Path.extend({
        statics: {
            //CLIP_PADDING: 0.02, // not sure if there's a need to set it to a small value
            CANVAS: true,
            SVG: false
        },

        redraw: function () {
            if (this._map) {
                this.projectLatlngs();
                this._requestUpdate();
            }
            return this;
        },

        setStyle: function (style) {
            L.setOptions(this, style);

            if (this._map) {
                this._updateStyle();
                this._requestUpdate();
            }
            return this;
        },

        onRemove: function (map) {
            map
                .off('viewreset', this.projectLatlngs, this)
                .off('moveend', this._updatePath, this);

            if (this.options.clickable) {
                this._map.off('click', this._onClick, this);
                this._map.off('mousemove', this._onMouseMove, this);
            }

            this._requestUpdate();

            this.fire('remove');
            this._map = null;
        },

        _requestUpdate: function () {
            if (this._map && !L.Path._updateRequest) {
                L.Path._updateRequest = L.Util.requestAnimFrame(this._fireMapMoveEnd, this._map);
            }
        },

        _fireMapMoveEnd: function () {
            L.Path._updateRequest = null;
            this.fire('moveend');
        },

        _initElements: function () {
            this._map._initPathRoot();
            this._ctx = this._map._canvasCtx;
        },

        _updateStyle: function () {
            var options = this.options;

            for (var style in options) {
                if (typeof this._ctx[style] === "number" || typeof this._ctx[style] === "string")
                    this._ctx[style] = options[style];
            }

            if (options.stroke) {
                this._ctx.lineWidth = options.weight;
                this._ctx.strokeStyle = options.color;
            }
            if (options.fill) {
                this._ctx.fillStyle = options.fillColor || options.color;
            }
        },

        _drawPath: function () {
            var i, j, len, len2, point, drawMethod;

            this._ctx.beginPath();

            for (i = 0, len = this._parts.length; i < len; i++) {
                for (j = 0, len2 = this._parts[i].length; j < len2; j++) {
                    point = this._parts[i][j];
                    drawMethod = (j === 0 ? 'move' : 'line') + 'To';

                    this._ctx[drawMethod](point.x, point.y);
                }
                // TODO refactor ugly hack
                if (this instanceof L.Polygon) {
                    this._ctx.closePath();
                }
            }
        },

        _checkIfEmpty: function () {
            return !this._parts.length;
        },

        _updatePath: function () {
            if (this._checkIfEmpty()) { return; }

            var ctx = this._ctx,
                options = this.options;

            this._drawPath();
            ctx.save();
            this._updateStyle();

            if (options.fill) {
                ctx.globalAlpha = options.fillOpacity;
                ctx.fill();
            }

            if (options.stroke) {
                ctx.globalAlpha = options.opacity;
                ctx.stroke();
            }

            ctx.restore();

            // TODO optimization: 1 fill/stroke for all features with equal style instead of 1 for each feature
        },

        _initEvents: function () {
            if (this.options.clickable) {
                // TODO dblclick
                this._map.on('mousemove', this._onMouseMove, this);
                this._map.on('click', this._onClick, this);
            }
        },

        _onClick: function (e) {
            if (this._containsPoint(e.layerPoint)) {
                this.fire('click', e);
            }
        },

        _onMouseMove: function (e) {
            if (!this._map || this._map._animatingZoom) { return; }

            // TODO don't do on each move
            if (this._containsPoint(e.layerPoint)) {
                this._ctx.canvas.style.cursor = 'pointer';
                this._mouseInside = true;
                this.fire('mouseover', e);

            } else if (this._mouseInside) {
                this._ctx.canvas.style.cursor = '';
                this._mouseInside = false;
                this.fire('mouseout', e);
            }
        }
    });

    L.Map.include((L.Path.SVG && !window.L_PREFER_CANVAS) || !L.Browser.canvas ? {} : {
        _initPathRoot: function () {
            var root = this._pathRoot,
                ctx;

            if (!root) {
                root = this._pathRoot = document.createElement('canvas');
                root.style.position = 'absolute';
                ctx = this._canvasCtx = root.getContext('2d');

                ctx.lineCap = 'round';
                ctx.lineJoin = 'round';

                this._panes.overlayPane.appendChild(root);

                if (this.options.zoomAnimation) {
                    this._pathRoot.className = 'leaflet-zoom-animated';
                    this.on('zoomanim', this._animatePathZoom);
                    this.on('zoomend', this._endPathZoom);
                }
                this.on('moveend', this._updateCanvasViewport);
                this._updateCanvasViewport();
            }
        },

        _updateCanvasViewport: function () {
            // don't redraw while zooming. See _updateSvgViewport for more details
            if (this._pathZooming) { return; }
            this._updatePathViewport();

            var vp = this._pathViewport,
                min = vp.min,
                size = vp.max.subtract(min),
                root = this._pathRoot;

            //TODO check if this works properly on mobile webkit
            L.DomUtil.setPosition(root, min);
            root.width = size.x;
            root.height = size.y;
            root.getContext('2d').translate(-min.x, -min.y);
        }
    });


    /*
     * L.LineUtil contains different utility functions for line segments
     * and polylines (clipping, simplification, distances, etc.)
     */

    /*jshint bitwise:false */ // allow bitwise operations for this file

    L.LineUtil = {

        // Simplify polyline with vertex reduction and Douglas-Peucker simplification.
        // Improves rendering performance dramatically by lessening the number of points to draw.

        simplify: function (/*Point[]*/ points, /*Number*/ tolerance) {
            if (!tolerance || !points.length) {
                return points.slice();
            }

            var sqTolerance = tolerance * tolerance;

            // stage 1: vertex reduction
            points = this._reducePoints(points, sqTolerance);

            // stage 2: Douglas-Peucker simplification
            points = this._simplifyDP(points, sqTolerance);

            return points;
        },

        // distance from a point to a segment between two points
        pointToSegmentDistance: function (/*Point*/ p, /*Point*/ p1, /*Point*/ p2) {
            return Math.sqrt(this._sqClosestPointOnSegment(p, p1, p2, true));
        },

        closestPointOnSegment: function (/*Point*/ p, /*Point*/ p1, /*Point*/ p2) {
            return this._sqClosestPointOnSegment(p, p1, p2);
        },

        // Douglas-Peucker simplification, see http://en.wikipedia.org/wiki/Douglas-Peucker_algorithm
        _simplifyDP: function (points, sqTolerance) {

            var len = points.length,
                ArrayConstructor = typeof Uint8Array !== undefined + '' ? Uint8Array : Array,
                markers = new ArrayConstructor(len);

            markers[0] = markers[len - 1] = 1;

            this._simplifyDPStep(points, markers, sqTolerance, 0, len - 1);

            var i,
                newPoints = [];

            for (i = 0; i < len; i++) {
                if (markers[i]) {
                    newPoints.push(points[i]);
                }
            }

            return newPoints;
        },

        _simplifyDPStep: function (points, markers, sqTolerance, first, last) {

            var maxSqDist = 0,
                index, i, sqDist;

            for (i = first + 1; i <= last - 1; i++) {
                sqDist = this._sqClosestPointOnSegment(points[i], points[first], points[last], true);

                if (sqDist > maxSqDist) {
                    index = i;
                    maxSqDist = sqDist;
                }
            }

            if (maxSqDist > sqTolerance) {
                markers[index] = 1;

                this._simplifyDPStep(points, markers, sqTolerance, first, index);
                this._simplifyDPStep(points, markers, sqTolerance, index, last);
            }
        },

        // reduce points that are too close to each other to a single point
        _reducePoints: function (points, sqTolerance) {
            var reducedPoints = [points[0]];

            for (var i = 1, prev = 0, len = points.length; i < len; i++) {
                if (this._sqDist(points[i], points[prev]) > sqTolerance) {
                    reducedPoints.push(points[i]);
                    prev = i;
                }
            }
            if (prev < len - 1) {
                reducedPoints.push(points[len - 1]);
            }
            return reducedPoints;
        },

        // Cohen-Sutherland line clipping algorithm.
        // Used to avoid rendering parts of a polyline that are not currently visible.

        clipSegment: function (a, b, bounds, useLastCode) {
            var codeA = useLastCode ? this._lastCode : this._getBitCode(a, bounds),
                codeB = this._getBitCode(b, bounds),

                codeOut, p, newCode;

            // save 2nd code to avoid calculating it on the next segment
            this._lastCode = codeB;

            while (true) {
                // if a,b is inside the clip window (trivial accept)
                if (!(codeA | codeB)) {
                    return [a, b];
                    // if a,b is outside the clip window (trivial reject)
                } else if (codeA & codeB) {
                    return false;
                    // other cases
                } else {
                    codeOut = codeA || codeB;
                    p = this._getEdgeIntersection(a, b, codeOut, bounds);
                    newCode = this._getBitCode(p, bounds);

                    if (codeOut === codeA) {
                        a = p;
                        codeA = newCode;
                    } else {
                        b = p;
                        codeB = newCode;
                    }
                }
            }
        },

        _getEdgeIntersection: function (a, b, code, bounds) {
            var dx = b.x - a.x,
                dy = b.y - a.y,
                min = bounds.min,
                max = bounds.max;

            if (code & 8) { // top
                return new L.Point(a.x + dx * (max.y - a.y) / dy, max.y);
            } else if (code & 4) { // bottom
                return new L.Point(a.x + dx * (min.y - a.y) / dy, min.y);
            } else if (code & 2) { // right
                return new L.Point(max.x, a.y + dy * (max.x - a.x) / dx);
            } else if (code & 1) { // left
                return new L.Point(min.x, a.y + dy * (min.x - a.x) / dx);
            }
        },

        _getBitCode: function (/*Point*/ p, bounds) {
            var code = 0;

            if (p.x < bounds.min.x) { // left
                code |= 1;
            } else if (p.x > bounds.max.x) { // right
                code |= 2;
            }
            if (p.y < bounds.min.y) { // bottom
                code |= 4;
            } else if (p.y > bounds.max.y) { // top
                code |= 8;
            }

            return code;
        },

        // square distance (to avoid unnecessary Math.sqrt calls)
        _sqDist: function (p1, p2) {
            var dx = p2.x - p1.x,
                dy = p2.y - p1.y;
            return dx * dx + dy * dy;
        },

        // return closest point on segment or distance to that point
        _sqClosestPointOnSegment: function (p, p1, p2, sqDist) {
            var x = p1.x,
                y = p1.y,
                dx = p2.x - x,
                dy = p2.y - y,
                dot = dx * dx + dy * dy,
                t;

            if (dot > 0) {
                t = ((p.x - x) * dx + (p.y - y) * dy) / dot;

                if (t > 1) {
                    x = p2.x;
                    y = p2.y;
                } else if (t > 0) {
                    x += dx * t;
                    y += dy * t;
                }
            }

            dx = p.x - x;
            dy = p.y - y;

            return sqDist ? dx * dx + dy * dy : new L.Point(x, y);
        }
    };


    /*
     * L.Polyline is used to display polylines on a map.
     */

    L.Polyline = L.Path.extend({
        initialize: function (latlngs, options) {
            L.Path.prototype.initialize.call(this, options);

            this._latlngs = this._convertLatLngs(latlngs);
        },

        options: {
            // how much to simplify the polyline on each zoom level
            // more = better performance and smoother look, less = more accurate
            smoothFactor: 1.0,
            noClip: false
        },

        projectLatlngs: function () {
            this._originalPoints = [];

            for (var i = 0, len = this._latlngs.length; i < len; i++) {
                this._originalPoints[i] = this._map.latLngToLayerPoint(this._latlngs[i]);
            }
        },

        getPathString: function () {
            for (var i = 0, len = this._parts.length, str = ''; i < len; i++) {
                str += this._getPathPartStr(this._parts[i]);
            }
            return str;
        },

        getLatLngs: function () {
            return this._latlngs;
        },

        setLatLngs: function (latlngs) {
            this._latlngs = this._convertLatLngs(latlngs);
            return this.redraw();
        },

        addLatLng: function (latlng) {
            this._latlngs.push(L.latLng(latlng));
            return this.redraw();
        },

        spliceLatLngs: function () { // (Number index, Number howMany)
            var removed = [].splice.apply(this._latlngs, arguments);
            this._convertLatLngs(this._latlngs, true);
            this.redraw();
            return removed;
        },

        closestLayerPoint: function (p) {
            var minDistance = Infinity, parts = this._parts, p1, p2, minPoint = null;

            for (var j = 0, jLen = parts.length; j < jLen; j++) {
                var points = parts[j];
                for (var i = 1, len = points.length; i < len; i++) {
                    p1 = points[i - 1];
                    p2 = points[i];
                    var sqDist = L.LineUtil._sqClosestPointOnSegment(p, p1, p2, true);
                    if (sqDist < minDistance) {
                        minDistance = sqDist;
                        minPoint = L.LineUtil._sqClosestPointOnSegment(p, p1, p2);
                    }
                }
            }
            if (minPoint) {
                minPoint.distance = Math.sqrt(minDistance);
            }
            return minPoint;
        },

        getBounds: function () {
            return new L.LatLngBounds(this.getLatLngs());
        },

        _convertLatLngs: function (latlngs, overwrite) {
            var i, len, target = overwrite ? latlngs : [];

            for (i = 0, len = latlngs.length; i < len; i++) {
                if (L.Util.isArray(latlngs[i]) && typeof latlngs[i][0] !== 'number') {
                    return;
                }
                target[i] = L.latLng(latlngs[i]);
            }
            return target;
        },

        _initEvents: function () {
            L.Path.prototype._initEvents.call(this);
        },

        _getPathPartStr: function (points) {
            var round = L.Path.VML;

            for (var j = 0, len2 = points.length, str = '', p; j < len2; j++) {
                p = points[j];
                if (round) {
                    p._round();
                }
                str += (j ? 'L' : 'M') + p.x + ' ' + p.y;
            }
            return str;
        },

        _clipPoints: function () {
            var points = this._originalPoints,
                len = points.length,
                i, k, segment;

            if (this.options.noClip) {
                this._parts = [points];
                return;
            }

            this._parts = [];

            var parts = this._parts,
                vp = this._map._pathViewport,
                lu = L.LineUtil;

            for (i = 0, k = 0; i < len - 1; i++) {
                segment = lu.clipSegment(points[i], points[i + 1], vp, i);
                if (!segment) {
                    continue;
                }

                parts[k] = parts[k] || [];
                parts[k].push(segment[0]);

                // if segment goes out of screen, or it's the last one, it's the end of the line part
                if ((segment[1] !== points[i + 1]) || (i === len - 2)) {
                    parts[k].push(segment[1]);
                    k++;
                }
            }
        },

        // simplify each clipped part of the polyline
        _simplifyPoints: function () {
            var parts = this._parts,
                lu = L.LineUtil;

            for (var i = 0, len = parts.length; i < len; i++) {
                parts[i] = lu.simplify(parts[i], this.options.smoothFactor);
            }
        },

        _updatePath: function () {
            if (!this._map) { return; }

            this._clipPoints();
            this._simplifyPoints();

            L.Path.prototype._updatePath.call(this);
        }
    });

    L.polyline = function (latlngs, options) {
        return new L.Polyline(latlngs, options);
    };


    /*
     * L.PolyUtil contains utility functions for polygons (clipping, etc.).
     */

    /*jshint bitwise:false */ // allow bitwise operations here

    L.PolyUtil = {};

    /*
     * Sutherland-Hodgeman polygon clipping algorithm.
     * Used to avoid rendering parts of a polygon that are not currently visible.
     */
    L.PolyUtil.clipPolygon = function (points, bounds) {
        var clippedPoints,
            edges = [1, 4, 2, 8],
            i, j, k,
            a, b,
            len, edge, p,
            lu = L.LineUtil;

        for (i = 0, len = points.length; i < len; i++) {
            points[i]._code = lu._getBitCode(points[i], bounds);
        }

        // for each edge (left, bottom, right, top)
        for (k = 0; k < 4; k++) {
            edge = edges[k];
            clippedPoints = [];

            for (i = 0, len = points.length, j = len - 1; i < len; j = i++) {
                a = points[i];
                b = points[j];

                // if a is inside the clip window
                if (!(a._code & edge)) {
                    // if b is outside the clip window (a->b goes out of screen)
                    if (b._code & edge) {
                        p = lu._getEdgeIntersection(b, a, edge, bounds);
                        p._code = lu._getBitCode(p, bounds);
                        clippedPoints.push(p);
                    }
                    clippedPoints.push(a);

                    // else if b is inside the clip window (a->b enters the screen)
                } else if (!(b._code & edge)) {
                    p = lu._getEdgeIntersection(b, a, edge, bounds);
                    p._code = lu._getBitCode(p, bounds);
                    clippedPoints.push(p);
                }
            }
            points = clippedPoints;
        }

        return points;
    };


    /*
     * L.Polygon is used to display polygons on a map.
     */

    L.Polygon = L.Polyline.extend({
        options: {
            fill: true
        },

        initialize: function (latlngs, options) {
            L.Polyline.prototype.initialize.call(this, latlngs, options);
            this._initWithHoles(latlngs);
        },

        _initWithHoles: function (latlngs) {
            var i, len, hole;
            if (latlngs && L.Util.isArray(latlngs[0]) && (typeof latlngs[0][0] !== 'number')) {
                this._latlngs = this._convertLatLngs(latlngs[0]);
                this._holes = latlngs.slice(1);

                for (i = 0, len = this._holes.length; i < len; i++) {
                    hole = this._holes[i] = this._convertLatLngs(this._holes[i]);
                    if (hole[0].equals(hole[hole.length - 1])) {
                        hole.pop();
                    }
                }
            }

            // filter out last point if its equal to the first one
            latlngs = this._latlngs;

            if (latlngs.length >= 2 && latlngs[0].equals(latlngs[latlngs.length - 1])) {
                latlngs.pop();
            }
        },

        projectLatlngs: function () {
            L.Polyline.prototype.projectLatlngs.call(this);

            // project polygon holes points
            // TODO move this logic to Polyline to get rid of duplication
            this._holePoints = [];

            if (!this._holes) { return; }

            var i, j, len, len2;

            for (i = 0, len = this._holes.length; i < len; i++) {
                this._holePoints[i] = [];

                for (j = 0, len2 = this._holes[i].length; j < len2; j++) {
                    this._holePoints[i][j] = this._map.latLngToLayerPoint(this._holes[i][j]);
                }
            }
        },

        setLatLngs: function (latlngs) {
            if (latlngs && L.Util.isArray(latlngs[0]) && (typeof latlngs[0][0] !== 'number')) {
                this._initWithHoles(latlngs);
                return this.redraw();
            } else {
                return L.Polyline.prototype.setLatLngs.call(this, latlngs);
            }
        },

        _clipPoints: function () {
            var points = this._originalPoints,
                newParts = [];

            this._parts = [points].concat(this._holePoints);

            if (this.options.noClip) { return; }

            for (var i = 0, len = this._parts.length; i < len; i++) {
                var clipped = L.PolyUtil.clipPolygon(this._parts[i], this._map._pathViewport);
                if (clipped.length) {
                    newParts.push(clipped);
                }
            }

            this._parts = newParts;
        },

        _getPathPartStr: function (points) {
            var str = L.Polyline.prototype._getPathPartStr.call(this, points);
            return str + (L.Browser.svg ? 'z' : 'x');
        }
    });

    L.polygon = function (latlngs, options) {
        return new L.Polygon(latlngs, options);
    };


    /*
     * Contains L.MultiPolyline and L.MultiPolygon layers.
     */

    (function () {
        function createMulti(Klass) {

            return L.FeatureGroup.extend({

                initialize: function (latlngs, options) {
                    this._layers = {};
                    this._options = options;
                    this.setLatLngs(latlngs);
                },

                setLatLngs: function (latlngs) {
                    var i = 0,
                        len = latlngs.length;

                    this.eachLayer(function (layer) {
                        if (i < len) {
                            layer.setLatLngs(latlngs[i++]);
                        } else {
                            this.removeLayer(layer);
                        }
                    }, this);

                    while (i < len) {
                        this.addLayer(new Klass(latlngs[i++], this._options));
                    }

                    return this;
                },

                getLatLngs: function () {
                    var latlngs = [];

                    this.eachLayer(function (layer) {
                        latlngs.push(layer.getLatLngs());
                    });

                    return latlngs;
                }
            });
        }

        L.MultiPolyline = createMulti(L.Polyline);
        L.MultiPolygon = createMulti(L.Polygon);

        L.multiPolyline = function (latlngs, options) {
            return new L.MultiPolyline(latlngs, options);
        };

        L.multiPolygon = function (latlngs, options) {
            return new L.MultiPolygon(latlngs, options);
        };
    }());


    /*
     * L.Rectangle extends Polygon and creates a rectangle when passed a LatLngBounds object.
     */

    L.Rectangle = L.Polygon.extend({
        initialize: function (latLngBounds, options) {
            L.Polygon.prototype.initialize.call(this, this._boundsToLatLngs(latLngBounds), options);
        },

        setBounds: function (latLngBounds) {
            this.setLatLngs(this._boundsToLatLngs(latLngBounds));
        },

        _boundsToLatLngs: function (latLngBounds) {
            latLngBounds = L.latLngBounds(latLngBounds);
            return [
                latLngBounds.getSouthWest(),
                latLngBounds.getNorthWest(),
                latLngBounds.getNorthEast(),
                latLngBounds.getSouthEast()
            ];
        }
    });

    L.rectangle = function (latLngBounds, options) {
        return new L.Rectangle(latLngBounds, options);
    };


    /*
     * L.Circle is a circle overlay (with a certain radius in meters).
     */

    L.Circle = L.Path.extend({
        initialize: function (latlng, radius, options) {
            L.Path.prototype.initialize.call(this, options);

            this._latlng = L.latLng(latlng);
            this._mRadius = radius;
        },

        options: {
            fill: true
        },

        setLatLng: function (latlng) {
            this._latlng = L.latLng(latlng);
            return this.redraw();
        },

        setRadius: function (radius) {
            this._mRadius = radius;
            return this.redraw();
        },

        projectLatlngs: function () {
            var lngRadius = this._getLngRadius(),
                latlng = this._latlng,
                pointLeft = this._map.latLngToLayerPoint([latlng.lat, latlng.lng - lngRadius]);

            this._point = this._map.latLngToLayerPoint(latlng);
            this._radius = Math.max(this._point.x - pointLeft.x, 1);
        },

        getBounds: function () {
            var lngRadius = this._getLngRadius(),
                latRadius = (this._mRadius / 40075017) * 360,
                latlng = this._latlng;

            return new L.LatLngBounds(
                    [latlng.lat - latRadius, latlng.lng - lngRadius],
                    [latlng.lat + latRadius, latlng.lng + lngRadius]);
        },

        getLatLng: function () {
            return this._latlng;
        },

        getPathString: function () {
            var p = this._point,
                r = this._radius;

            if (this._checkIfEmpty()) {
                return '';
            }

            if (L.Browser.svg) {
                return 'M' + p.x + ',' + (p.y - r) +
                       'A' + r + ',' + r + ',0,1,1,' +
                       (p.x - 0.1) + ',' + (p.y - r) + ' z';
            } else {
                p._round();
                r = Math.round(r);
                return 'AL ' + p.x + ',' + p.y + ' ' + r + ',' + r + ' 0,' + (65535 * 360);
            }
        },

        getRadius: function () {
            return this._mRadius;
        },

        // TODO Earth hardcoded, move into projection code!

        _getLatRadius: function () {
            return (this._mRadius / 40075017) * 360;
        },

        _getLngRadius: function () {
            return this._getLatRadius() / Math.cos(L.LatLng.DEG_TO_RAD * this._latlng.lat);
        },

        _checkIfEmpty: function () {
            if (!this._map) {
                return false;
            }
            var vp = this._map._pathViewport,
                r = this._radius,
                p = this._point;

            return p.x - r > vp.max.x || p.y - r > vp.max.y ||
                   p.x + r < vp.min.x || p.y + r < vp.min.y;
        }
    });

    L.circle = function (latlng, radius, options) {
        return new L.Circle(latlng, radius, options);
    };


    /*
     * L.CircleMarker is a circle overlay with a permanent pixel radius.
     */

    L.CircleMarker = L.Circle.extend({
        options: {
            radius: 10,
            weight: 2
        },

        initialize: function (latlng, options) {
            L.Circle.prototype.initialize.call(this, latlng, null, options);
            this._radius = this.options.radius;
        },

        projectLatlngs: function () {
            this._point = this._map.latLngToLayerPoint(this._latlng);
        },

        _updateStyle: function () {
            L.Circle.prototype._updateStyle.call(this);
            this.setRadius(this.options.radius);
        },

        setLatLng: function (latlng) {
            L.Circle.prototype.setLatLng.call(this, latlng);
            if (this._popup && this._popup._isOpen) {
                this._popup.setLatLng(latlng);
            }
            return this;
        },

        setRadius: function (radius) {
            this.options.radius = this._radius = radius;
            return this.redraw();
        },

        getRadius: function () {
            return this._radius;
        }
    });

    L.circleMarker = function (latlng, options) {
        return new L.CircleMarker(latlng, options);
    };


    /*
     * Extends L.Polyline to be able to manually detect clicks on Canvas-rendered polylines.
     */

    L.Polyline.include(!L.Path.CANVAS ? {} : {
        _containsPoint: function (p, closed) {
            var i, j, k, len, len2, dist, part,
                w = this.options.weight / 2;

            if (L.Browser.touch) {
                w += 10; // polyline click tolerance on touch devices
            }

            for (i = 0, len = this._parts.length; i < len; i++) {
                part = this._parts[i];
                for (j = 0, len2 = part.length, k = len2 - 1; j < len2; k = j++) {
                    if (!closed && (j === 0)) {
                        continue;
                    }

                    dist = L.LineUtil.pointToSegmentDistance(p, part[k], part[j]);

                    if (dist <= w) {
                        return true;
                    }
                }
            }
            return false;
        }
    });


    /*
     * Extends L.Polygon to be able to manually detect clicks on Canvas-rendered polygons.
     */

    L.Polygon.include(!L.Path.CANVAS ? {} : {
        _containsPoint: function (p) {
            var inside = false,
                part, p1, p2,
                i, j, k,
                len, len2;

            // TODO optimization: check if within bounds first

            if (L.Polyline.prototype._containsPoint.call(this, p, true)) {
                // click on polygon border
                return true;
            }

            // ray casting algorithm for detecting if point is in polygon

            for (i = 0, len = this._parts.length; i < len; i++) {
                part = this._parts[i];

                for (j = 0, len2 = part.length, k = len2 - 1; j < len2; k = j++) {
                    p1 = part[j];
                    p2 = part[k];

                    if (((p1.y > p.y) !== (p2.y > p.y)) &&
                            (p.x < (p2.x - p1.x) * (p.y - p1.y) / (p2.y - p1.y) + p1.x)) {
                        inside = !inside;
                    }
                }
            }

            return inside;
        }
    });


    /*
     * Extends L.Circle with Canvas-specific code.
     */

    L.Circle.include(!L.Path.CANVAS ? {} : {
        _drawPath: function () {
            var p = this._point;
            this._ctx.beginPath();
            this._ctx.arc(p.x, p.y, this._radius, 0, Math.PI * 2, false);
        },

        _containsPoint: function (p) {
            var center = this._point,
                w2 = this.options.stroke ? this.options.weight / 2 : 0;

            return (p.distanceTo(center) <= this._radius + w2);
        }
    });


    /*
     * CircleMarker canvas specific drawing parts.
     */

    L.CircleMarker.include(!L.Path.CANVAS ? {} : {
        _updateStyle: function () {
            L.Path.prototype._updateStyle.call(this);
        }
    });


    /*
     * L.GeoJSON turns any GeoJSON data into a Leaflet layer.
     */

    L.GeoJSON = L.FeatureGroup.extend({

        initialize: function (geojson, options) {
            L.setOptions(this, options);

            this._layers = {};

            if (geojson) {
                this.addData(geojson);
            }
        },

        addData: function (geojson) {
            var features = L.Util.isArray(geojson) ? geojson : geojson.features,
                i, len, feature;

            if (features) {
                for (i = 0, len = features.length; i < len; i++) {
                    // Only add this if geometry or geometries are set and not null
                    feature = features[i];
                    if (feature.geometries || feature.geometry || feature.features || feature.coordinates) {
                        this.addData(features[i]);
                    }
                }
                return this;
            }

            var options = this.options;

            if (options.filter && !options.filter(geojson)) { return; }

            var layer = L.GeoJSON.geometryToLayer(geojson, options.pointToLayer, options.coordsToLatLng, options);
            layer.feature = L.GeoJSON.asFeature(geojson);

            layer.defaultOptions = layer.options;
            this.resetStyle(layer);

            if (options.onEachFeature) {
                options.onEachFeature(geojson, layer);
            }

            return this.addLayer(layer);
        },

        resetStyle: function (layer) {
            var style = this.options.style;
            if (style) {
                // reset any custom styles
                L.Util.extend(layer.options, layer.defaultOptions);

                this._setLayerStyle(layer, style);
            }
        },

        setStyle: function (style) {
            this.eachLayer(function (layer) {
                this._setLayerStyle(layer, style);
            }, this);
        },

        _setLayerStyle: function (layer, style) {
            if (typeof style === 'function') {
                style = style(layer.feature);
            }
            if (layer.setStyle) {
                layer.setStyle(style);
            }
        }
    });

    L.extend(L.GeoJSON, {
        geometryToLayer: function (geojson, pointToLayer, coordsToLatLng, vectorOptions) {
            var geometry = geojson.type === 'Feature' ? geojson.geometry : geojson,
                coords = geometry.coordinates,
                layers = [],
                latlng, latlngs, i, len;

            coordsToLatLng = coordsToLatLng || this.coordsToLatLng;

            switch (geometry.type) {
                case 'Point':
                    latlng = coordsToLatLng(coords);
                    return pointToLayer ? pointToLayer(geojson, latlng) : new L.Marker(latlng);

                case 'MultiPoint':
                    for (i = 0, len = coords.length; i < len; i++) {
                        latlng = coordsToLatLng(coords[i]);
                        layers.push(pointToLayer ? pointToLayer(geojson, latlng) : new L.Marker(latlng));
                    }
                    return new L.FeatureGroup(layers);

                case 'LineString':
                    latlngs = this.coordsToLatLngs(coords, 0, coordsToLatLng);
                    return new L.Polyline(latlngs, vectorOptions);

                case 'Polygon':
                    if (coords.length === 2 && !coords[1].length) {
                        throw new Error('Invalid GeoJSON object.');
                    }
                    latlngs = this.coordsToLatLngs(coords, 1, coordsToLatLng);
                    return new L.Polygon(latlngs, vectorOptions);

                case 'MultiLineString':
                    latlngs = this.coordsToLatLngs(coords, 1, coordsToLatLng);
                    return new L.MultiPolyline(latlngs, vectorOptions);

                case 'MultiPolygon':
                    latlngs = this.coordsToLatLngs(coords, 2, coordsToLatLng);
                    return new L.MultiPolygon(latlngs, vectorOptions);

                case 'GeometryCollection':
                    for (i = 0, len = geometry.geometries.length; i < len; i++) {

                        layers.push(this.geometryToLayer({
                            geometry: geometry.geometries[i],
                            type: 'Feature',
                            properties: geojson.properties
                        }, pointToLayer, coordsToLatLng, vectorOptions));
                    }
                    return new L.FeatureGroup(layers);

                default:
                    throw new Error('Invalid GeoJSON object.');
            }
        },

        coordsToLatLng: function (coords) { // (Array[, Boolean]) -> LatLng
            return new L.LatLng(coords[1], coords[0], coords[2]);
        },

        coordsToLatLngs: function (coords, levelsDeep, coordsToLatLng) { // (Array[, Number, Function]) -> Array
            var latlng, i, len,
                latlngs = [];

            for (i = 0, len = coords.length; i < len; i++) {
                latlng = levelsDeep ?
                        this.coordsToLatLngs(coords[i], levelsDeep - 1, coordsToLatLng) :
                        (coordsToLatLng || this.coordsToLatLng)(coords[i]);

                latlngs.push(latlng);
            }

            return latlngs;
        },

        latLngToCoords: function (latlng) {
            var coords = [latlng.lng, latlng.lat];

            if (latlng.alt !== undefined) {
                coords.push(latlng.alt);
            }
            return coords;
        },

        latLngsToCoords: function (latLngs) {
            var coords = [];

            for (var i = 0, len = latLngs.length; i < len; i++) {
                coords.push(L.GeoJSON.latLngToCoords(latLngs[i]));
            }

            return coords;
        },

        getFeature: function (layer, newGeometry) {
            return layer.feature ? L.extend({}, layer.feature, { geometry: newGeometry }) : L.GeoJSON.asFeature(newGeometry);
        },

        asFeature: function (geoJSON) {
            if (geoJSON.type === 'Feature') {
                return geoJSON;
            }

            return {
                type: 'Feature',
                properties: {},
                geometry: geoJSON
            };
        }
    });

    var PointToGeoJSON = {
        toGeoJSON: function () {
            return L.GeoJSON.getFeature(this, {
                type: 'Point',
                coordinates: L.GeoJSON.latLngToCoords(this.getLatLng())
            });
        }
    };

    L.Marker.include(PointToGeoJSON);
    L.Circle.include(PointToGeoJSON);
    L.CircleMarker.include(PointToGeoJSON);

    L.Polyline.include({
        toGeoJSON: function () {
            return L.GeoJSON.getFeature(this, {
                type: 'LineString',
                coordinates: L.GeoJSON.latLngsToCoords(this.getLatLngs())
            });
        }
    });

    L.Polygon.include({
        toGeoJSON: function () {
            var coords = [L.GeoJSON.latLngsToCoords(this.getLatLngs())],
                i, len, hole;

            coords[0].push(coords[0][0]);

            if (this._holes) {
                for (i = 0, len = this._holes.length; i < len; i++) {
                    hole = L.GeoJSON.latLngsToCoords(this._holes[i]);
                    hole.push(hole[0]);
                    coords.push(hole);
                }
            }

            return L.GeoJSON.getFeature(this, {
                type: 'Polygon',
                coordinates: coords
            });
        }
    });

    (function () {
        function multiToGeoJSON(type) {
            return function () {
                var coords = [];

                this.eachLayer(function (layer) {
                    coords.push(layer.toGeoJSON().geometry.coordinates);
                });

                return L.GeoJSON.getFeature(this, {
                    type: type,
                    coordinates: coords
                });
            };
        }

        L.MultiPolyline.include({ toGeoJSON: multiToGeoJSON('MultiLineString') });
        L.MultiPolygon.include({ toGeoJSON: multiToGeoJSON('MultiPolygon') });

        L.LayerGroup.include({
            toGeoJSON: function () {

                var geometry = this.feature && this.feature.geometry,
                    jsons = [],
                    json;

                if (geometry && geometry.type === 'MultiPoint') {
                    return multiToGeoJSON('MultiPoint').call(this);
                }

                var isGeometryCollection = geometry && geometry.type === 'GeometryCollection';

                this.eachLayer(function (layer) {
                    if (layer.toGeoJSON) {
                        json = layer.toGeoJSON();
                        jsons.push(isGeometryCollection ? json.geometry : L.GeoJSON.asFeature(json));
                    }
                });

                if (isGeometryCollection) {
                    return L.GeoJSON.getFeature(this, {
                        geometries: jsons,
                        type: 'GeometryCollection'
                    });
                }

                return {
                    type: 'FeatureCollection',
                    features: jsons
                };
            }
        });
    }());

    L.geoJson = function (geojson, options) {
        return new L.GeoJSON(geojson, options);
    };


    /*
     * L.DomEvent contains functions for working with DOM events.
     */

    L.DomEvent = {
        /* inspired by John Resig, Dean Edwards and YUI addEvent implementations */
        addListener: function (obj, type, fn, context) { // (HTMLElement, String, Function[, Object])

            var id = L.stamp(fn),
                key = '_leaflet_' + type + id,
                handler, originalHandler, newType;

            if (obj[key]) { return this; }

            handler = function (e) {
                return fn.call(context || obj, e || L.DomEvent._getEvent());
            };

            if (L.Browser.pointer && type.indexOf('touch') === 0) {
                return this.addPointerListener(obj, type, handler, id);
            }
            if (L.Browser.touch && (type === 'dblclick') && this.addDoubleTapListener) {
                this.addDoubleTapListener(obj, handler, id);
            }

            if ('addEventListener' in obj) {

                if (type === 'mousewheel') {
                    obj.addEventListener('DOMMouseScroll', handler, false);
                    obj.addEventListener(type, handler, false);

                } else if ((type === 'mouseenter') || (type === 'mouseleave')) {

                    originalHandler = handler;
                    newType = (type === 'mouseenter' ? 'mouseover' : 'mouseout');

                    handler = function (e) {
                        if (!L.DomEvent._checkMouse(obj, e)) { return; }
                        return originalHandler(e);
                    };

                    obj.addEventListener(newType, handler, false);

                } else if (type === 'click' && L.Browser.android) {
                    originalHandler = handler;
                    handler = function (e) {
                        return L.DomEvent._filterClick(e, originalHandler);
                    };

                    obj.addEventListener(type, handler, false);
                } else {
                    obj.addEventListener(type, handler, false);
                }

            } else if ('attachEvent' in obj) {
                obj.attachEvent('on' + type, handler);
            }

            obj[key] = handler;

            return this;
        },

        removeListener: function (obj, type, fn) {  // (HTMLElement, String, Function)

            var id = L.stamp(fn),
                key = '_leaflet_' + type + id,
                handler = obj[key];

            if (!handler) { return this; }

            if (L.Browser.pointer && type.indexOf('touch') === 0) {
                this.removePointerListener(obj, type, id);
            } else if (L.Browser.touch && (type === 'dblclick') && this.removeDoubleTapListener) {
                this.removeDoubleTapListener(obj, id);

            } else if ('removeEventListener' in obj) {

                if (type === 'mousewheel') {
                    obj.removeEventListener('DOMMouseScroll', handler, false);
                    obj.removeEventListener(type, handler, false);

                } else if ((type === 'mouseenter') || (type === 'mouseleave')) {
                    obj.removeEventListener((type === 'mouseenter' ? 'mouseover' : 'mouseout'), handler, false);
                } else {
                    obj.removeEventListener(type, handler, false);
                }
            } else if ('detachEvent' in obj) {
                obj.detachEvent('on' + type, handler);
            }

            obj[key] = null;

            return this;
        },

        stopPropagation: function (e) {

            if (e.stopPropagation) {
                e.stopPropagation();
            } else {
                e.cancelBubble = true;
            }
            L.DomEvent._skipped(e);

            return this;
        },

        disableScrollPropagation: function (el) {
            var stop = L.DomEvent.stopPropagation;

            return L.DomEvent
                .on(el, 'mousewheel', stop)
                .on(el, 'MozMousePixelScroll', stop);
        },

        disableClickPropagation: function (el) {
            var stop = L.DomEvent.stopPropagation;

            for (var i = L.Draggable.START.length - 1; i >= 0; i--) {
                L.DomEvent.on(el, L.Draggable.START[i], stop);
            }

            return L.DomEvent
                .on(el, 'click', L.DomEvent._fakeStop)
                .on(el, 'dblclick', stop);
        },

        preventDefault: function (e) {

            if (e.preventDefault) {
                e.preventDefault();
            } else {
                e.returnValue = false;
            }
            return this;
        },

        stop: function (e) {
            return L.DomEvent
                .preventDefault(e)
                .stopPropagation(e);
        },

        getMousePosition: function (e, container) {
            if (!container) {
                return new L.Point(e.clientX, e.clientY);
            }

            var rect = container.getBoundingClientRect();

            return new L.Point(
                e.clientX - rect.left - container.clientLeft,
                e.clientY - rect.top - container.clientTop);
        },

        getWheelDelta: function (e) {

            var delta = 0;

            if (e.wheelDelta) {
                delta = e.wheelDelta / 120;
            }
            if (e.detail) {
                delta = -e.detail / 3;
            }
            return delta;
        },

        _skipEvents: {},

        _fakeStop: function (e) {
            // fakes stopPropagation by setting a special event flag, checked/reset with L.DomEvent._skipped(e)
            L.DomEvent._skipEvents[e.type] = true;
        },

        _skipped: function (e) {
            var skipped = this._skipEvents[e.type];
            // reset when checking, as it's only used in map container and propagates outside of the map
            this._skipEvents[e.type] = false;
            return skipped;
        },

        // check if element really left/entered the event target (for mouseenter/mouseleave)
        _checkMouse: function (el, e) {

            var related = e.relatedTarget;

            if (!related) { return true; }

            try {
                while (related && (related !== el)) {
                    related = related.parentNode;
                }
            } catch (err) {
                return false;
            }
            return (related !== el);
        },

        _getEvent: function () { // evil magic for IE
            /*jshint noarg:false */
            var e = window.event;
            if (!e) {
                var caller = arguments.callee.caller;
                while (caller) {
                    e = caller['arguments'][0];
                    if (e && window.Event === e.constructor) {
                        break;
                    }
                    caller = caller.caller;
                }
            }
            return e;
        },

        // this is a horrible workaround for a bug in Android where a single touch triggers two click events
        _filterClick: function (e, handler) {
            var timeStamp = (e.timeStamp || e.originalEvent.timeStamp),
                elapsed = L.DomEvent._lastClick && (timeStamp - L.DomEvent._lastClick);

            // are they closer together than 500ms yet more than 100ms?
            // Android typically triggers them ~300ms apart while multiple listeners
            // on the same event should be triggered far faster;
            // or check if click is simulated on the element, and if it is, reject any non-simulated events

            if ((elapsed && elapsed > 100 && elapsed < 500) || (e.target._simulatedClick && !e._simulated)) {
                L.DomEvent.stop(e);
                return;
            }
            L.DomEvent._lastClick = timeStamp;

            return handler(e);
        }
    };

    L.DomEvent.on = L.DomEvent.addListener;
    L.DomEvent.off = L.DomEvent.removeListener;


    /*
     * L.Draggable allows you to add dragging capabilities to any element. Supports mobile devices too.
     */

    L.Draggable = L.Class.extend({
        includes: L.Mixin.Events,

        statics: {
            START: L.Browser.touch ? ['touchstart', 'mousedown'] : ['mousedown'],
            END: {
                mousedown: 'mouseup',
                touchstart: 'touchend',
                pointerdown: 'touchend',
                MSPointerDown: 'touchend'
            },
            MOVE: {
                mousedown: 'mousemove',
                touchstart: 'touchmove',
                pointerdown: 'touchmove',
                MSPointerDown: 'touchmove'
            }
        },

        initialize: function (element, dragStartTarget) {
            this._element = element;
            this._dragStartTarget = dragStartTarget || element;
        },

        enable: function () {
            if (this._enabled) { return; }

            for (var i = L.Draggable.START.length - 1; i >= 0; i--) {
                L.DomEvent.on(this._dragStartTarget, L.Draggable.START[i], this._onDown, this);
            }

            this._enabled = true;
        },

        disable: function () {
            if (!this._enabled) { return; }

            for (var i = L.Draggable.START.length - 1; i >= 0; i--) {
                L.DomEvent.off(this._dragStartTarget, L.Draggable.START[i], this._onDown, this);
            }

            this._enabled = false;
            this._moved = false;
        },

        _onDown: function (e) {
            this._moved = false;

            if (e.shiftKey || ((e.which !== 1) && (e.button !== 1) && !e.touches)) { return; }

            L.DomEvent.stopPropagation(e);

            if (L.Draggable._disabled) { return; }

            L.DomUtil.disableImageDrag();
            L.DomUtil.disableTextSelection();

            if (this._moving) { return; }

            var first = e.touches ? e.touches[0] : e;

            this._startPoint = new L.Point(first.clientX, first.clientY);
            this._startPos = this._newPos = L.DomUtil.getPosition(this._element);

            L.DomEvent
                .on(document, L.Draggable.MOVE[e.type], this._onMove, this)
                .on(document, L.Draggable.END[e.type], this._onUp, this);
        },

        _onMove: function (e) {
            if (e.touches && e.touches.length > 1) {
                this._moved = true;
                return;
            }

            var first = (e.touches && e.touches.length === 1 ? e.touches[0] : e),
                newPoint = new L.Point(first.clientX, first.clientY),
                offset = newPoint.subtract(this._startPoint);

            if (!offset.x && !offset.y) { return; }
            if (L.Browser.touch && Math.abs(offset.x) + Math.abs(offset.y) < 3) { return; }

            L.DomEvent.preventDefault(e);

            if (!this._moved) {
                this.fire('dragstart');

                this._moved = true;
                this._startPos = L.DomUtil.getPosition(this._element).subtract(offset);

                L.DomUtil.addClass(document.body, 'leaflet-dragging');
                this._lastTarget = e.target || e.srcElement;
                L.DomUtil.addClass(this._lastTarget, 'leaflet-drag-target');
            }

            this._newPos = this._startPos.add(offset);
            this._moving = true;

            L.Util.cancelAnimFrame(this._animRequest);
            this._animRequest = L.Util.requestAnimFrame(this._updatePosition, this, true, this._dragStartTarget);
        },

        _updatePosition: function () {
            this.fire('predrag');
            L.DomUtil.setPosition(this._element, this._newPos);
            this.fire('drag');
        },

        _onUp: function () {
            L.DomUtil.removeClass(document.body, 'leaflet-dragging');

            if (this._lastTarget) {
                L.DomUtil.removeClass(this._lastTarget, 'leaflet-drag-target');
                this._lastTarget = null;
            }

            for (var i in L.Draggable.MOVE) {
                L.DomEvent
                    .off(document, L.Draggable.MOVE[i], this._onMove)
                    .off(document, L.Draggable.END[i], this._onUp);
            }

            L.DomUtil.enableImageDrag();
            L.DomUtil.enableTextSelection();

            if (this._moved && this._moving) {
                // ensure drag is not fired after dragend
                L.Util.cancelAnimFrame(this._animRequest);

                this.fire('dragend', {
                    distance: this._newPos.distanceTo(this._startPos)
                });
            }

            this._moving = false;
        }
    });


    /*
        L.Handler is a base class for handler classes that are used internally to inject
        interaction features like dragging to classes like Map and Marker.
    */

    L.Handler = L.Class.extend({
        initialize: function (map) {
            this._map = map;
        },

        enable: function () {
            if (this._enabled) { return; }

            this._enabled = true;
            this.addHooks();
        },

        disable: function () {
            if (!this._enabled) { return; }

            this._enabled = false;
            this.removeHooks();
        },

        enabled: function () {
            return !!this._enabled;
        }
    });


    /*
     * L.Handler.MapDrag is used to make the map draggable (with panning inertia), enabled by default.
     */

    L.Map.mergeOptions({
        dragging: true,

        inertia: !L.Browser.android23,
        inertiaDeceleration: 3400, // px/s^2
        inertiaMaxSpeed: Infinity, // px/s
        inertiaThreshold: L.Browser.touch ? 32 : 18, // ms
        easeLinearity: 0.25,

        // TODO refactor, move to CRS
        worldCopyJump: false
    });

    L.Map.Drag = L.Handler.extend({
        addHooks: function () {
            if (!this._draggable) {
                var map = this._map;

                this._draggable = new L.Draggable(map._mapPane, map._container);

                this._draggable.on({
                    'dragstart': this._onDragStart,
                    'drag': this._onDrag,
                    'dragend': this._onDragEnd
                }, this);

                if (map.options.worldCopyJump) {
                    this._draggable.on('predrag', this._onPreDrag, this);
                    map.on('viewreset', this._onViewReset, this);

                    map.whenReady(this._onViewReset, this);
                }
            }
            this._draggable.enable();
        },

        removeHooks: function () {
            this._draggable.disable();
        },

        moved: function () {
            return this._draggable && this._draggable._moved;
        },

        _onDragStart: function () {
            var map = this._map;

            if (map._panAnim) {
                map._panAnim.stop();
            }

            map
                .fire('movestart')
                .fire('dragstart');

            if (map.options.inertia) {
                this._positions = [];
                this._times = [];
            }
        },

        _onDrag: function () {
            if (this._map.options.inertia) {
                var time = this._lastTime = +new Date(),
                    pos = this._lastPos = this._draggable._newPos;

                this._positions.push(pos);
                this._times.push(time);

                if (time - this._times[0] > 200) {
                    this._positions.shift();
                    this._times.shift();
                }
            }

            this._map
                .fire('move')
                .fire('drag');
        },

        _onViewReset: function () {
            // TODO fix hardcoded Earth values
            var pxCenter = this._map.getSize()._divideBy(2),
                pxWorldCenter = this._map.latLngToLayerPoint([0, 0]);

            this._initialWorldOffset = pxWorldCenter.subtract(pxCenter).x;
            this._worldWidth = this._map.project([0, 180]).x;
        },

        _onPreDrag: function () {
            // TODO refactor to be able to adjust map pane position after zoom
            var worldWidth = this._worldWidth,
                halfWidth = Math.round(worldWidth / 2),
                dx = this._initialWorldOffset,
                x = this._draggable._newPos.x,
                newX1 = (x - halfWidth + dx) % worldWidth + halfWidth - dx,
                newX2 = (x + halfWidth + dx) % worldWidth - halfWidth - dx,
                newX = Math.abs(newX1 + dx) < Math.abs(newX2 + dx) ? newX1 : newX2;

            this._draggable._newPos.x = newX;
        },

        _onDragEnd: function (e) {
            var map = this._map,
                options = map.options,
                delay = +new Date() - this._lastTime,

                noInertia = !options.inertia || delay > options.inertiaThreshold || !this._positions[0];

            map.fire('dragend', e);

            if (noInertia) {
                map.fire('moveend');

            } else {

                var direction = this._lastPos.subtract(this._positions[0]),
                    duration = (this._lastTime + delay - this._times[0]) / 1000,
                    ease = options.easeLinearity,

                    speedVector = direction.multiplyBy(ease / duration),
                    speed = speedVector.distanceTo([0, 0]),

                    limitedSpeed = Math.min(options.inertiaMaxSpeed, speed),
                    limitedSpeedVector = speedVector.multiplyBy(limitedSpeed / speed),

                    decelerationDuration = limitedSpeed / (options.inertiaDeceleration * ease),
                    offset = limitedSpeedVector.multiplyBy(-decelerationDuration / 2).round();

                if (!offset.x || !offset.y) {
                    map.fire('moveend');

                } else {
                    offset = map._limitOffset(offset, map.options.maxBounds);

                    L.Util.requestAnimFrame(function () {
                        map.panBy(offset, {
                            duration: decelerationDuration,
                            easeLinearity: ease,
                            noMoveStart: true
                        });
                    });
                }
            }
        }
    });

    L.Map.addInitHook('addHandler', 'dragging', L.Map.Drag);


    /*
     * L.Handler.DoubleClickZoom is used to handle double-click zoom on the map, enabled by default.
     */

    L.Map.mergeOptions({
        doubleClickZoom: true
    });

    L.Map.DoubleClickZoom = L.Handler.extend({
        addHooks: function () {
            this._map.on('dblclick', this._onDoubleClick, this);
        },

        removeHooks: function () {
            this._map.off('dblclick', this._onDoubleClick, this);
        },

        _onDoubleClick: function (e) {
            var map = this._map,
                zoom = map.getZoom() + (e.originalEvent.shiftKey ? -1 : 1);

            if (map.options.doubleClickZoom === 'center') {
                map.setZoom(zoom);
            } else {
                map.setZoomAround(e.containerPoint, zoom);
            }
        }
    });

    L.Map.addInitHook('addHandler', 'doubleClickZoom', L.Map.DoubleClickZoom);


    /*
     * L.Handler.ScrollWheelZoom is used by L.Map to enable mouse scroll wheel zoom on the map.
     */

    L.Map.mergeOptions({
        scrollWheelZoom: true
    });

    L.Map.ScrollWheelZoom = L.Handler.extend({
        addHooks: function () {
            L.DomEvent.on(this._map._container, 'mousewheel', this._onWheelScroll, this);
            L.DomEvent.on(this._map._container, 'MozMousePixelScroll', L.DomEvent.preventDefault);
            this._delta = 0;
        },

        removeHooks: function () {
            L.DomEvent.off(this._map._container, 'mousewheel', this._onWheelScroll);
            L.DomEvent.off(this._map._container, 'MozMousePixelScroll', L.DomEvent.preventDefault);
        },

        _onWheelScroll: function (e) {
            var delta = L.DomEvent.getWheelDelta(e);

            this._delta += delta;
            this._lastMousePos = this._map.mouseEventToContainerPoint(e);

            if (!this._startTime) {
                this._startTime = +new Date();
            }

            var left = Math.max(40 - (+new Date() - this._startTime), 0);

            clearTimeout(this._timer);
            this._timer = setTimeout(L.bind(this._performZoom, this), left);

            L.DomEvent.preventDefault(e);
            L.DomEvent.stopPropagation(e);
        },

        _performZoom: function () {
            var map = this._map,
                delta = this._delta,
                zoom = map.getZoom();

            delta = delta > 0 ? Math.ceil(delta) : Math.floor(delta);
            delta = Math.max(Math.min(delta, 4), -4);
            delta = map._limitZoom(zoom + delta) - zoom;

            this._delta = 0;
            this._startTime = null;

            if (!delta) { return; }

            if (map.options.scrollWheelZoom === 'center') {
                map.setZoom(zoom + delta);
            } else {
                map.setZoomAround(this._lastMousePos, zoom + delta);
            }
        }
    });

    L.Map.addInitHook('addHandler', 'scrollWheelZoom', L.Map.ScrollWheelZoom);


    /*
     * Extends the event handling code with double tap support for mobile browsers.
     */

    L.extend(L.DomEvent, {

        _touchstart: L.Browser.msPointer ? 'MSPointerDown' : L.Browser.pointer ? 'pointerdown' : 'touchstart',
        _touchend: L.Browser.msPointer ? 'MSPointerUp' : L.Browser.pointer ? 'pointerup' : 'touchend',

        // inspired by Zepto touch code by Thomas Fuchs
        addDoubleTapListener: function (obj, handler, id) {
            var last,
                doubleTap = false,
                delay = 250,
                touch,
                pre = '_leaflet_',
                touchstart = this._touchstart,
                touchend = this._touchend,
                trackedTouches = [];

            function onTouchStart(e) {
                var count;

                if (L.Browser.pointer) {
                    trackedTouches.push(e.pointerId);
                    count = trackedTouches.length;
                } else {
                    count = e.touches.length;
                }
                if (count > 1) {
                    return;
                }

                var now = Date.now(),
                    delta = now - (last || now);

                touch = e.touches ? e.touches[0] : e;
                doubleTap = (delta > 0 && delta <= delay);
                last = now;
            }

            function onTouchEnd(e) {
                if (L.Browser.pointer) {
                    var idx = trackedTouches.indexOf(e.pointerId);
                    if (idx === -1) {
                        return;
                    }
                    trackedTouches.splice(idx, 1);
                }

                if (doubleTap) {
                    if (L.Browser.pointer) {
                        // work around .type being readonly with MSPointer* events
                        var newTouch = {},
                            prop;

                        // jshint forin:false
                        for (var i in touch) {
                            prop = touch[i];
                            if (typeof prop === 'function') {
                                newTouch[i] = prop.bind(touch);
                            } else {
                                newTouch[i] = prop;
                            }
                        }
                        touch = newTouch;
                    }
                    touch.type = 'dblclick';
                    handler(touch);
                    last = null;
                }
            }
            obj[pre + touchstart + id] = onTouchStart;
            obj[pre + touchend + id] = onTouchEnd;

            // on pointer we need to listen on the document, otherwise a drag starting on the map and moving off screen
            // will not come through to us, so we will lose track of how many touches are ongoing
            var endElement = L.Browser.pointer ? document.documentElement : obj;

            obj.addEventListener(touchstart, onTouchStart, false);
            endElement.addEventListener(touchend, onTouchEnd, false);

            if (L.Browser.pointer) {
                endElement.addEventListener(L.DomEvent.POINTER_CANCEL, onTouchEnd, false);
            }

            return this;
        },

        removeDoubleTapListener: function (obj, id) {
            var pre = '_leaflet_';

            obj.removeEventListener(this._touchstart, obj[pre + this._touchstart + id], false);
            (L.Browser.pointer ? document.documentElement : obj).removeEventListener(
                    this._touchend, obj[pre + this._touchend + id], false);

            if (L.Browser.pointer) {
                document.documentElement.removeEventListener(L.DomEvent.POINTER_CANCEL, obj[pre + this._touchend + id],
                    false);
            }

            return this;
        }
    });


    /*
     * Extends L.DomEvent to provide touch support for Internet Explorer and Windows-based devices.
     */

    L.extend(L.DomEvent, {

        //static
        POINTER_DOWN: L.Browser.msPointer ? 'MSPointerDown' : 'pointerdown',
        POINTER_MOVE: L.Browser.msPointer ? 'MSPointerMove' : 'pointermove',
        POINTER_UP: L.Browser.msPointer ? 'MSPointerUp' : 'pointerup',
        POINTER_CANCEL: L.Browser.msPointer ? 'MSPointerCancel' : 'pointercancel',

        _pointers: [],
        _pointerDocumentListener: false,

        // Provides a touch events wrapper for (ms)pointer events.
        // Based on changes by veproza https://github.com/CloudMade/Leaflet/pull/1019
        //ref http://www.w3.org/TR/pointerevents/ https://www.w3.org/Bugs/Public/show_bug.cgi?id=22890

        addPointerListener: function (obj, type, handler, id) {

            switch (type) {
                case 'touchstart':
                    return this.addPointerListenerStart(obj, type, handler, id);
                case 'touchend':
                    return this.addPointerListenerEnd(obj, type, handler, id);
                case 'touchmove':
                    return this.addPointerListenerMove(obj, type, handler, id);
                default:
                    throw 'Unknown touch event type';
            }
        },

        addPointerListenerStart: function (obj, type, handler, id) {
            var pre = '_leaflet_',
                pointers = this._pointers;

            var cb = function (e) {

                L.DomEvent.preventDefault(e);

                var alreadyInArray = false;
                for (var i = 0; i < pointers.length; i++) {
                    if (pointers[i].pointerId === e.pointerId) {
                        alreadyInArray = true;
                        break;
                    }
                }
                if (!alreadyInArray) {
                    pointers.push(e);
                }

                e.touches = pointers.slice();
                e.changedTouches = [e];

                handler(e);
            };

            obj[pre + 'touchstart' + id] = cb;
            obj.addEventListener(this.POINTER_DOWN, cb, false);

            // need to also listen for end events to keep the _pointers list accurate
            // this needs to be on the body and never go away
            if (!this._pointerDocumentListener) {
                var internalCb = function (e) {
                    for (var i = 0; i < pointers.length; i++) {
                        if (pointers[i].pointerId === e.pointerId) {
                            pointers.splice(i, 1);
                            break;
                        }
                    }
                };
                //We listen on the documentElement as any drags that end by moving the touch off the screen get fired there
                document.documentElement.addEventListener(this.POINTER_UP, internalCb, false);
                document.documentElement.addEventListener(this.POINTER_CANCEL, internalCb, false);

                this._pointerDocumentListener = true;
            }

            return this;
        },

        addPointerListenerMove: function (obj, type, handler, id) {
            var pre = '_leaflet_',
                touches = this._pointers;

            function cb(e) {

                // don't fire touch moves when mouse isn't down
                if ((e.pointerType === e.MSPOINTER_TYPE_MOUSE || e.pointerType === 'mouse') && e.buttons === 0) { return; }

                for (var i = 0; i < touches.length; i++) {
                    if (touches[i].pointerId === e.pointerId) {
                        touches[i] = e;
                        break;
                    }
                }

                e.touches = touches.slice();
                e.changedTouches = [e];

                handler(e);
            }

            obj[pre + 'touchmove' + id] = cb;
            obj.addEventListener(this.POINTER_MOVE, cb, false);

            return this;
        },

        addPointerListenerEnd: function (obj, type, handler, id) {
            var pre = '_leaflet_',
                touches = this._pointers;

            var cb = function (e) {
                for (var i = 0; i < touches.length; i++) {
                    if (touches[i].pointerId === e.pointerId) {
                        touches.splice(i, 1);
                        break;
                    }
                }

                e.touches = touches.slice();
                e.changedTouches = [e];

                handler(e);
            };

            obj[pre + 'touchend' + id] = cb;
            obj.addEventListener(this.POINTER_UP, cb, false);
            obj.addEventListener(this.POINTER_CANCEL, cb, false);

            return this;
        },

        removePointerListener: function (obj, type, id) {
            var pre = '_leaflet_',
                cb = obj[pre + type + id];

            switch (type) {
                case 'touchstart':
                    obj.removeEventListener(this.POINTER_DOWN, cb, false);
                    break;
                case 'touchmove':
                    obj.removeEventListener(this.POINTER_MOVE, cb, false);
                    break;
                case 'touchend':
                    obj.removeEventListener(this.POINTER_UP, cb, false);
                    obj.removeEventListener(this.POINTER_CANCEL, cb, false);
                    break;
            }

            return this;
        }
    });


    /*
     * L.Handler.TouchZoom is used by L.Map to add pinch zoom on supported mobile browsers.
     */

    L.Map.mergeOptions({
        touchZoom: L.Browser.touch && !L.Browser.android23,
        bounceAtZoomLimits: true
    });

    L.Map.TouchZoom = L.Handler.extend({
        addHooks: function () {
            L.DomEvent.on(this._map._container, 'touchstart', this._onTouchStart, this);
        },

        removeHooks: function () {
            L.DomEvent.off(this._map._container, 'touchstart', this._onTouchStart, this);
        },

        _onTouchStart: function (e) {
            var map = this._map;

            if (!e.touches || e.touches.length !== 2 || map._animatingZoom || this._zooming) { return; }

            var p1 = map.mouseEventToLayerPoint(e.touches[0]),
                p2 = map.mouseEventToLayerPoint(e.touches[1]),
                viewCenter = map._getCenterLayerPoint();

            this._startCenter = p1.add(p2)._divideBy(2);
            this._startDist = p1.distanceTo(p2);

            this._moved = false;
            this._zooming = true;

            this._centerOffset = viewCenter.subtract(this._startCenter);

            if (map._panAnim) {
                map._panAnim.stop();
            }

            L.DomEvent
                .on(document, 'touchmove', this._onTouchMove, this)
                .on(document, 'touchend', this._onTouchEnd, this);

            L.DomEvent.preventDefault(e);
        },

        _onTouchMove: function (e) {
            var map = this._map;

            if (!e.touches || e.touches.length !== 2 || !this._zooming) { return; }

            var p1 = map.mouseEventToLayerPoint(e.touches[0]),
                p2 = map.mouseEventToLayerPoint(e.touches[1]);

            this._scale = p1.distanceTo(p2) / this._startDist;
            this._delta = p1._add(p2)._divideBy(2)._subtract(this._startCenter);

            if (this._scale === 1) { return; }

            if (!map.options.bounceAtZoomLimits) {
                if ((map.getZoom() === map.getMinZoom() && this._scale < 1) ||
                    (map.getZoom() === map.getMaxZoom() && this._scale > 1)) { return; }
            }

            if (!this._moved) {
                L.DomUtil.addClass(map._mapPane, 'leaflet-touching');

                map
                    .fire('movestart')
                    .fire('zoomstart');

                this._moved = true;
            }

            L.Util.cancelAnimFrame(this._animRequest);
            this._animRequest = L.Util.requestAnimFrame(
                    this._updateOnMove, this, true, this._map._container);

            L.DomEvent.preventDefault(e);
        },

        _updateOnMove: function () {
            var map = this._map,
                origin = this._getScaleOrigin(),
                center = map.layerPointToLatLng(origin),
                zoom = map.getScaleZoom(this._scale);

            map._animateZoom(center, zoom, this._startCenter, this._scale, this._delta, false, true);
        },

        _onTouchEnd: function () {
            if (!this._moved || !this._zooming) {
                this._zooming = false;
                return;
            }

            var map = this._map;

            this._zooming = false;
            L.DomUtil.removeClass(map._mapPane, 'leaflet-touching');
            L.Util.cancelAnimFrame(this._animRequest);

            L.DomEvent
                .off(document, 'touchmove', this._onTouchMove)
                .off(document, 'touchend', this._onTouchEnd);

            var origin = this._getScaleOrigin(),
                center = map.layerPointToLatLng(origin),

                oldZoom = map.getZoom(),
                floatZoomDelta = map.getScaleZoom(this._scale) - oldZoom,
                roundZoomDelta = (floatZoomDelta > 0 ?
                        Math.ceil(floatZoomDelta) : Math.floor(floatZoomDelta)),

                zoom = map._limitZoom(oldZoom + roundZoomDelta),
                scale = map.getZoomScale(zoom) / this._scale;

            map._animateZoom(center, zoom, origin, scale);
        },

        _getScaleOrigin: function () {
            var centerOffset = this._centerOffset.subtract(this._delta).divideBy(this._scale);
            return this._startCenter.add(centerOffset);
        }
    });

    L.Map.addInitHook('addHandler', 'touchZoom', L.Map.TouchZoom);


    /*
     * L.Map.Tap is used to enable mobile hacks like quick taps and long hold.
     */

    L.Map.mergeOptions({
        tap: true,
        tapTolerance: 15
    });

    L.Map.Tap = L.Handler.extend({
        addHooks: function () {
            L.DomEvent.on(this._map._container, 'touchstart', this._onDown, this);
        },

        removeHooks: function () {
            L.DomEvent.off(this._map._container, 'touchstart', this._onDown, this);
        },

        _onDown: function (e) {
            if (!e.touches) { return; }

            L.DomEvent.preventDefault(e);

            this._fireClick = true;

            // don't simulate click or track longpress if more than 1 touch
            if (e.touches.length > 1) {
                this._fireClick = false;
                clearTimeout(this._holdTimeout);
                return;
            }

            var first = e.touches[0],
                el = first.target;

            this._startPos = this._newPos = new L.Point(first.clientX, first.clientY);

            // if touching a link, highlight it
            if (el.tagName && el.tagName.toLowerCase() === 'a') {
                L.DomUtil.addClass(el, 'leaflet-active');
            }

            // simulate long hold but setting a timeout
            this._holdTimeout = setTimeout(L.bind(function () {
                if (this._isTapValid()) {
                    this._fireClick = false;
                    this._onUp();
                    this._simulateEvent('contextmenu', first);
                }
            }, this), 1000);

            L.DomEvent
                .on(document, 'touchmove', this._onMove, this)
                .on(document, 'touchend', this._onUp, this);
        },

        _onUp: function (e) {
            clearTimeout(this._holdTimeout);

            L.DomEvent
                .off(document, 'touchmove', this._onMove, this)
                .off(document, 'touchend', this._onUp, this);

            if (this._fireClick && e && e.changedTouches) {

                var first = e.changedTouches[0],
                    el = first.target;

                if (el && el.tagName && el.tagName.toLowerCase() === 'a') {
                    L.DomUtil.removeClass(el, 'leaflet-active');
                }

                // simulate click if the touch didn't move too much
                if (this._isTapValid()) {
                    this._simulateEvent('click', first);
                }
            }
        },

        _isTapValid: function () {
            return this._newPos.distanceTo(this._startPos) <= this._map.options.tapTolerance;
        },

        _onMove: function (e) {
            var first = e.touches[0];
            this._newPos = new L.Point(first.clientX, first.clientY);
        },

        _simulateEvent: function (type, e) {
            var simulatedEvent = document.createEvent('MouseEvents');

            simulatedEvent._simulated = true;
            e.target._simulatedClick = true;

            simulatedEvent.initMouseEvent(
                    type, true, true, window, 1,
                    e.screenX, e.screenY,
                    e.clientX, e.clientY,
                    false, false, false, false, 0, null);

            e.target.dispatchEvent(simulatedEvent);
        }
    });

    if (L.Browser.touch && !L.Browser.pointer) {
        L.Map.addInitHook('addHandler', 'tap', L.Map.Tap);
    }


    /*
     * L.Handler.ShiftDragZoom is used to add shift-drag zoom interaction to the map
      * (zoom to a selected bounding box), enabled by default.
     */

    L.Map.mergeOptions({
        boxZoom: true
    });

    L.Map.BoxZoom = L.Handler.extend({
        initialize: function (map) {
            this._map = map;
            this._container = map._container;
            this._pane = map._panes.overlayPane;
            this._moved = false;
        },

        addHooks: function () {
            L.DomEvent.on(this._container, 'mousedown', this._onMouseDown, this);
        },

        removeHooks: function () {
            L.DomEvent.off(this._container, 'mousedown', this._onMouseDown);
            this._moved = false;
        },

        moved: function () {
            return this._moved;
        },

        _onMouseDown: function (e) {
            this._moved = false;

            if (!e.shiftKey || ((e.which !== 1) && (e.button !== 1))) { return false; }

            L.DomUtil.disableTextSelection();
            L.DomUtil.disableImageDrag();

            this._startLayerPoint = this._map.mouseEventToLayerPoint(e);

            L.DomEvent
                .on(document, 'mousemove', this._onMouseMove, this)
                .on(document, 'mouseup', this._onMouseUp, this)
                .on(document, 'keydown', this._onKeyDown, this);
        },

        _onMouseMove: function (e) {
            if (!this._moved) {
                this._box = L.DomUtil.create('div', 'leaflet-zoom-box', this._pane);
                L.DomUtil.setPosition(this._box, this._startLayerPoint);

                //TODO refactor: move cursor to styles
                this._container.style.cursor = 'crosshair';
                this._map.fire('boxzoomstart');
            }

            var startPoint = this._startLayerPoint,
                box = this._box,

                layerPoint = this._map.mouseEventToLayerPoint(e),
                offset = layerPoint.subtract(startPoint),

                newPos = new L.Point(
                    Math.min(layerPoint.x, startPoint.x),
                    Math.min(layerPoint.y, startPoint.y));

            L.DomUtil.setPosition(box, newPos);

            this._moved = true;

            // TODO refactor: remove hardcoded 4 pixels
            box.style.width = (Math.max(0, Math.abs(offset.x) - 4)) + 'px';
            box.style.height = (Math.max(0, Math.abs(offset.y) - 4)) + 'px';
        },

        _finish: function () {
            if (this._moved) {
                this._pane.removeChild(this._box);
                this._container.style.cursor = '';
            }

            L.DomUtil.enableTextSelection();
            L.DomUtil.enableImageDrag();

            L.DomEvent
                .off(document, 'mousemove', this._onMouseMove)
                .off(document, 'mouseup', this._onMouseUp)
                .off(document, 'keydown', this._onKeyDown);
        },

        _onMouseUp: function (e) {

            this._finish();

            var map = this._map,
                layerPoint = map.mouseEventToLayerPoint(e);

            if (this._startLayerPoint.equals(layerPoint)) { return; }

            var bounds = new L.LatLngBounds(
                    map.layerPointToLatLng(this._startLayerPoint),
                    map.layerPointToLatLng(layerPoint));

            map.fitBounds(bounds);

            map.fire('boxzoomend', {
                boxZoomBounds: bounds
            });
        },

        _onKeyDown: function (e) {
            if (e.keyCode === 27) {
                this._finish();
            }
        }
    });

    L.Map.addInitHook('addHandler', 'boxZoom', L.Map.BoxZoom);


    /*
     * L.Map.Keyboard is handling keyboard interaction with the map, enabled by default.
     */

    L.Map.mergeOptions({
        keyboard: true,
        keyboardPanOffset: 80,
        keyboardZoomOffset: 1
    });

    L.Map.Keyboard = L.Handler.extend({

        keyCodes: {
            left: [37],
            right: [39],
            down: [40],
            up: [38],
            zoomIn: [187, 107, 61, 171],
            zoomOut: [189, 109, 173]
        },

        initialize: function (map) {
            this._map = map;

            this._setPanOffset(map.options.keyboardPanOffset);
            this._setZoomOffset(map.options.keyboardZoomOffset);
        },

        addHooks: function () {
            var container = this._map._container;

            // make the container focusable by tabbing
            if (container.tabIndex === -1) {
                container.tabIndex = '0';
            }

            L.DomEvent
                .on(container, 'focus', this._onFocus, this)
                .on(container, 'blur', this._onBlur, this)
                .on(container, 'mousedown', this._onMouseDown, this);

            this._map
                .on('focus', this._addHooks, this)
                .on('blur', this._removeHooks, this);
        },

        removeHooks: function () {
            this._removeHooks();

            var container = this._map._container;

            L.DomEvent
                .off(container, 'focus', this._onFocus, this)
                .off(container, 'blur', this._onBlur, this)
                .off(container, 'mousedown', this._onMouseDown, this);

            this._map
                .off('focus', this._addHooks, this)
                .off('blur', this._removeHooks, this);
        },

        _onMouseDown: function () {
            if (this._focused) { return; }

            var body = document.body,
                docEl = document.documentElement,
                top = body.scrollTop || docEl.scrollTop,
                left = body.scrollLeft || docEl.scrollLeft;

            this._map._container.focus();

            window.scrollTo(left, top);
        },

        _onFocus: function () {
            this._focused = true;
            this._map.fire('focus');
        },

        _onBlur: function () {
            this._focused = false;
            this._map.fire('blur');
        },

        _setPanOffset: function (pan) {
            var keys = this._panKeys = {},
                codes = this.keyCodes,
                i, len;

            for (i = 0, len = codes.left.length; i < len; i++) {
                keys[codes.left[i]] = [-1 * pan, 0];
            }
            for (i = 0, len = codes.right.length; i < len; i++) {
                keys[codes.right[i]] = [pan, 0];
            }
            for (i = 0, len = codes.down.length; i < len; i++) {
                keys[codes.down[i]] = [0, pan];
            }
            for (i = 0, len = codes.up.length; i < len; i++) {
                keys[codes.up[i]] = [0, -1 * pan];
            }
        },

        _setZoomOffset: function (zoom) {
            var keys = this._zoomKeys = {},
                codes = this.keyCodes,
                i, len;

            for (i = 0, len = codes.zoomIn.length; i < len; i++) {
                keys[codes.zoomIn[i]] = zoom;
            }
            for (i = 0, len = codes.zoomOut.length; i < len; i++) {
                keys[codes.zoomOut[i]] = -zoom;
            }
        },

        _addHooks: function () {
            L.DomEvent.on(document, 'keydown', this._onKeyDown, this);
        },

        _removeHooks: function () {
            L.DomEvent.off(document, 'keydown', this._onKeyDown, this);
        },

        _onKeyDown: function (e) {
            var key = e.keyCode,
                map = this._map;

            if (key in this._panKeys) {

                if (map._panAnim && map._panAnim._inProgress) { return; }

                map.panBy(this._panKeys[key]);

                if (map.options.maxBounds) {
                    map.panInsideBounds(map.options.maxBounds);
                }

            } else if (key in this._zoomKeys) {
                map.setZoom(map.getZoom() + this._zoomKeys[key]);

            } else {
                return;
            }

            L.DomEvent.stop(e);
        }
    });

    L.Map.addInitHook('addHandler', 'keyboard', L.Map.Keyboard);


    /*
     * L.Handler.MarkerDrag is used internally by L.Marker to make the markers draggable.
     */

    L.Handler.MarkerDrag = L.Handler.extend({
        initialize: function (marker) {
            this._marker = marker;
        },

        addHooks: function () {
            var icon = this._marker._icon;
            if (!this._draggable) {
                this._draggable = new L.Draggable(icon, icon);
            }

            this._draggable
                .on('dragstart', this._onDragStart, this)
                .on('drag', this._onDrag, this)
                .on('dragend', this._onDragEnd, this);
            this._draggable.enable();
            L.DomUtil.addClass(this._marker._icon, 'leaflet-marker-draggable');
        },

        removeHooks: function () {
            this._draggable
                .off('dragstart', this._onDragStart, this)
                .off('drag', this._onDrag, this)
                .off('dragend', this._onDragEnd, this);

            this._draggable.disable();
            L.DomUtil.removeClass(this._marker._icon, 'leaflet-marker-draggable');
        },

        moved: function () {
            return this._draggable && this._draggable._moved;
        },

        _onDragStart: function () {
            this._marker
                .closePopup()
                .fire('movestart')
                .fire('dragstart');
        },

        _onDrag: function () {
            var marker = this._marker,
                shadow = marker._shadow,
                iconPos = L.DomUtil.getPosition(marker._icon),
                latlng = marker._map.layerPointToLatLng(iconPos);

            // update shadow position
            if (shadow) {
                L.DomUtil.setPosition(shadow, iconPos);
            }

            marker._latlng = latlng;

            marker
                .fire('move', { latlng: latlng })
                .fire('drag');
        },

        _onDragEnd: function (e) {
            this._marker
                .fire('moveend')
                .fire('dragend', e);
        }
    });


    /*
     * L.Control is a base class for implementing map controls. Handles positioning.
     * All other controls extend from this class.
     */

    L.Control = L.Class.extend({
        options: {
            position: 'topright'
        },

        initialize: function (options) {
            L.setOptions(this, options);
        },

        getPosition: function () {
            return this.options.position;
        },

        setPosition: function (position) {
            var map = this._map;

            if (map) {
                map.removeControl(this);
            }

            this.options.position = position;

            if (map) {
                map.addControl(this);
            }

            return this;
        },

        getContainer: function () {
            return this._container;
        },

        addTo: function (map) {
            this._map = map;

            var container = this._container = this.onAdd(map),
                pos = this.getPosition(),
                corner = map._controlCorners[pos];

            L.DomUtil.addClass(container, 'leaflet-control');

            if (pos.indexOf('bottom') !== -1) {
                corner.insertBefore(container, corner.firstChild);
            } else {
                corner.appendChild(container);
            }

            return this;
        },

        removeFrom: function (map) {
            var pos = this.getPosition(),
                corner = map._controlCorners[pos];

            corner.removeChild(this._container);
            this._map = null;

            if (this.onRemove) {
                this.onRemove(map);
            }

            return this;
        },

        _refocusOnMap: function () {
            if (this._map) {
                this._map.getContainer().focus();
            }
        }
    });

    L.control = function (options) {
        return new L.Control(options);
    };


    // adds control-related methods to L.Map

    L.Map.include({
        addControl: function (control) {
            control.addTo(this);
            return this;
        },

        removeControl: function (control) {
            control.removeFrom(this);
            return this;
        },

        _initControlPos: function () {
            var corners = this._controlCorners = {},
                l = 'leaflet-',
                container = this._controlContainer =
                        L.DomUtil.create('div', l + 'control-container', this._container);

            function createCorner(vSide, hSide) {
                var className = l + vSide + ' ' + l + hSide;

                corners[vSide + hSide] = L.DomUtil.create('div', className, container);
            }

            createCorner('top', 'left');
            createCorner('top', 'right');
            createCorner('bottom', 'left');
            createCorner('bottom', 'right');
        },

        _clearControlPos: function () {
            this._container.removeChild(this._controlContainer);
        }
    });


    /*
     * L.Control.Zoom is used for the default zoom buttons on the map.
     */

    L.Control.Zoom = L.Control.extend({
        options: {
            position: 'topleft',
            zoomInText: '+',
            zoomInTitle: 'Zoom in',
            zoomOutText: '-',
            zoomOutTitle: 'Zoom out'
        },

        onAdd: function (map) {
            var zoomName = 'leaflet-control-zoom',
                container = L.DomUtil.create('div', zoomName + ' leaflet-bar');

            this._map = map;

            this._zoomInButton = this._createButton(
                    this.options.zoomInText, this.options.zoomInTitle,
                    zoomName + '-in', container, this._zoomIn, this);
            this._zoomOutButton = this._createButton(
                    this.options.zoomOutText, this.options.zoomOutTitle,
                    zoomName + '-out', container, this._zoomOut, this);

            this._updateDisabled();
            map.on('zoomend zoomlevelschange', this._updateDisabled, this);

            return container;
        },

        onRemove: function (map) {
            map.off('zoomend zoomlevelschange', this._updateDisabled, this);
        },

        _zoomIn: function (e) {
            this._map.zoomIn(e.shiftKey ? 3 : 1);
        },

        _zoomOut: function (e) {
            this._map.zoomOut(e.shiftKey ? 3 : 1);
        },

        _createButton: function (html, title, className, container, fn, context) {
            var link = L.DomUtil.create('a', className, container);
            link.innerHTML = html;
            link.href = '#';
            link.title = title;

            var stop = L.DomEvent.stopPropagation;

            L.DomEvent
                .on(link, 'click', stop)
                .on(link, 'mousedown', stop)
                .on(link, 'dblclick', stop)
                .on(link, 'click', L.DomEvent.preventDefault)
                .on(link, 'click', fn, context)
                .on(link, 'click', this._refocusOnMap, context);

            return link;
        },

        _updateDisabled: function () {
            var map = this._map,
                className = 'leaflet-disabled';

            L.DomUtil.removeClass(this._zoomInButton, className);
            L.DomUtil.removeClass(this._zoomOutButton, className);

            if (map._zoom === map.getMinZoom()) {
                L.DomUtil.addClass(this._zoomOutButton, className);
            }
            if (map._zoom === map.getMaxZoom()) {
                L.DomUtil.addClass(this._zoomInButton, className);
            }
        }
    });

    L.Map.mergeOptions({
        zoomControl: true
    });

    L.Map.addInitHook(function () {
        if (this.options.zoomControl) {
            this.zoomControl = new L.Control.Zoom();
            this.addControl(this.zoomControl);
        }
    });

    L.control.zoom = function (options) {
        return new L.Control.Zoom(options);
    };



    /*
     * L.Control.Attribution is used for displaying attribution on the map (added by default).
     */

    L.Control.Attribution = L.Control.extend({
        options: {
            position: 'bottomright',
            prefix: '<a href="http://leafletjs.com" title="A JS library for interactive maps">Leaflet</a>'
        },

        initialize: function (options) {
            L.setOptions(this, options);

            this._attributions = {};
        },

        onAdd: function (map) {
            this._container = L.DomUtil.create('div', 'leaflet-control-attribution');
            L.DomEvent.disableClickPropagation(this._container);

            for (var i in map._layers) {
                if (map._layers[i].getAttribution) {
                    this.addAttribution(map._layers[i].getAttribution());
                }
            }

            map
                .on('layeradd', this._onLayerAdd, this)
                .on('layerremove', this._onLayerRemove, this);

            this._update();

            return this._container;
        },

        onRemove: function (map) {
            map
                .off('layeradd', this._onLayerAdd)
                .off('layerremove', this._onLayerRemove);

        },

        setPrefix: function (prefix) {
            this.options.prefix = prefix;
            this._update();
            return this;
        },

        addAttribution: function (text) {
            if (!text) { return; }

            if (!this._attributions[text]) {
                this._attributions[text] = 0;
            }
            this._attributions[text]++;

            this._update();

            return this;
        },

        removeAttribution: function (text) {
            if (!text) { return; }

            if (this._attributions[text]) {
                this._attributions[text]--;
                this._update();
            }

            return this;
        },

        _update: function () {
            if (!this._map) { return; }

            var attribs = [];

            for (var i in this._attributions) {
                if (this._attributions[i]) {
                    attribs.push(i);
                }
            }

            var prefixAndAttribs = [];

            if (this.options.prefix) {
                prefixAndAttribs.push(this.options.prefix);
            }
            if (attribs.length) {
                prefixAndAttribs.push(attribs.join(', '));
            }

            this._container.innerHTML = prefixAndAttribs.join(' | ');
        },

        _onLayerAdd: function (e) {
            if (e.layer.getAttribution) {
                this.addAttribution(e.layer.getAttribution());
            }
        },

        _onLayerRemove: function (e) {
            if (e.layer.getAttribution) {
                this.removeAttribution(e.layer.getAttribution());
            }
        }
    });

    L.Map.mergeOptions({
        attributionControl: true
    });

    L.Map.addInitHook(function () {
        if (this.options.attributionControl) {
            this.attributionControl = (new L.Control.Attribution()).addTo(this);
        }
    });

    L.control.attribution = function (options) {
        return new L.Control.Attribution(options);
    };


    /*
     * L.Control.Scale is used for displaying metric/imperial scale on the map.
     */

    L.Control.Scale = L.Control.extend({
        options: {
            position: 'bottomleft',
            maxWidth: 100,
            metric: true,
            imperial: true,
            updateWhenIdle: false
        },

        onAdd: function (map) {
            this._map = map;

            var className = 'leaflet-control-scale',
                container = L.DomUtil.create('div', className),
                options = this.options;

            this._addScales(options, className, container);

            map.on(options.updateWhenIdle ? 'moveend' : 'move', this._update, this);
            map.whenReady(this._update, this);

            return container;
        },

        onRemove: function (map) {
            map.off(this.options.updateWhenIdle ? 'moveend' : 'move', this._update, this);
        },

        _addScales: function (options, className, container) {
            if (options.metric) {
                this._mScale = L.DomUtil.create('div', className + '-line', container);
            }
            if (options.imperial) {
                this._iScale = L.DomUtil.create('div', className + '-line', container);
            }
        },

        _update: function () {
            var bounds = this._map.getBounds(),
                centerLat = bounds.getCenter().lat,
                halfWorldMeters = 6378137 * Math.PI * Math.cos(centerLat * Math.PI / 180),
                dist = halfWorldMeters * (bounds.getNorthEast().lng - bounds.getSouthWest().lng) / 180,

                size = this._map.getSize(),
                options = this.options,
                maxMeters = 0;

            if (size.x > 0) {
                maxMeters = dist * (options.maxWidth / size.x);
            }

            this._updateScales(options, maxMeters);
        },

        _updateScales: function (options, maxMeters) {
            if (options.metric && maxMeters) {
                this._updateMetric(maxMeters);
            }

            if (options.imperial && maxMeters) {
                this._updateImperial(maxMeters);
            }
        },

        _updateMetric: function (maxMeters) {
            var meters = this._getRoundNum(maxMeters);

            this._mScale.style.width = this._getScaleWidth(meters / maxMeters) + 'px';
            this._mScale.innerHTML = meters < 1000 ? meters + ' m' : (meters / 1000) + ' km';
        },

        _updateImperial: function (maxMeters) {
            var maxFeet = maxMeters * 3.2808399,
                scale = this._iScale,
                maxMiles, miles, feet;

            if (maxFeet > 5280) {
                maxMiles = maxFeet / 5280;
                miles = this._getRoundNum(maxMiles);

                scale.style.width = this._getScaleWidth(miles / maxMiles) + 'px';
                scale.innerHTML = miles + ' mi';

            } else {
                feet = this._getRoundNum(maxFeet);

                scale.style.width = this._getScaleWidth(feet / maxFeet) + 'px';
                scale.innerHTML = feet + ' ft';
            }
        },

        _getScaleWidth: function (ratio) {
            return Math.round(this.options.maxWidth * ratio) - 10;
        },

        _getRoundNum: function (num) {
            var pow10 = Math.pow(10, (Math.floor(num) + '').length - 1),
                d = num / pow10;

            d = d >= 10 ? 10 : d >= 5 ? 5 : d >= 3 ? 3 : d >= 2 ? 2 : 1;

            return pow10 * d;
        }
    });

    L.control.scale = function (options) {
        return new L.Control.Scale(options);
    };


    /*
     * L.Control.Layers is a control to allow users to switch between different layers on the map.
     */

    L.Control.Layers = L.Control.extend({
        options: {
            collapsed: true,
            position: 'topright',
            autoZIndex: true
        },

        initialize: function (baseLayers, overlays, options) {
            L.setOptions(this, options);

            this._layers = {};
            this._lastZIndex = 0;
            this._handlingClick = false;

            for (var i in baseLayers) {
                this._addLayer(baseLayers[i], i);
            }

            for (i in overlays) {
                this._addLayer(overlays[i], i, true);
            }
        },

        onAdd: function (map) {
            this._initLayout();
            this._update();

            map
                .on('layeradd', this._onLayerChange, this)
                .on('layerremove', this._onLayerChange, this);

            return this._container;
        },

        onRemove: function (map) {
            map
                .off('layeradd', this._onLayerChange, this)
                .off('layerremove', this._onLayerChange, this);
        },

        addBaseLayer: function (layer, name) {
            this._addLayer(layer, name);
            this._update();
            return this;
        },

        addOverlay: function (layer, name) {
            this._addLayer(layer, name, true);
            this._update();
            return this;
        },

        removeLayer: function (layer) {
            var id = L.stamp(layer);
            delete this._layers[id];
            this._update();
            return this;
        },

        _initLayout: function () {
            var className = 'leaflet-control-layers',
                container = this._container = L.DomUtil.create('div', className);

            //Makes this work on IE10 Touch devices by stopping it from firing a mouseout event when the touch is released
            container.setAttribute('aria-haspopup', true);

            if (!L.Browser.touch) {
                L.DomEvent
                    .disableClickPropagation(container)
                    .disableScrollPropagation(container);
            } else {
                L.DomEvent.on(container, 'click', L.DomEvent.stopPropagation);
            }

            var form = this._form = L.DomUtil.create('form', className + '-list');

            if (this.options.collapsed) {
                if (!L.Browser.android) {
                    L.DomEvent
                        .on(container, 'mouseover', this._expand, this)
                        .on(container, 'mouseout', this._collapse, this);
                }
                var link = this._layersLink = L.DomUtil.create('a', className + '-toggle', container);
                link.href = '#';
                link.title = 'Layers';

                if (L.Browser.touch) {
                    L.DomEvent
                        .on(link, 'click', L.DomEvent.stop)
                        .on(link, 'click', this._expand, this);
                }
                else {
                    L.DomEvent.on(link, 'focus', this._expand, this);
                }
                //Work around for Firefox android issue https://github.com/Leaflet/Leaflet/issues/2033
                L.DomEvent.on(form, 'click', function () {
                    setTimeout(L.bind(this._onInputClick, this), 0);
                }, this);

                this._map.on('click', this._collapse, this);
                // TODO keyboard accessibility
            } else {
                this._expand();
            }

            this._baseLayersList = L.DomUtil.create('div', className + '-base', form);
            this._separator = L.DomUtil.create('div', className + '-separator', form);
            this._overlaysList = L.DomUtil.create('div', className + '-overlays', form);

            container.appendChild(form);
        },

        _addLayer: function (layer, name, overlay) {
            var id = L.stamp(layer);

            this._layers[id] = {
                layer: layer,
                name: name,
                overlay: overlay
            };

            if (this.options.autoZIndex && layer.setZIndex) {
                this._lastZIndex++;
                layer.setZIndex(this._lastZIndex);
            }
        },

        _update: function () {
            if (!this._container) {
                return;
            }

            this._baseLayersList.innerHTML = '';
            this._overlaysList.innerHTML = '';

            var baseLayersPresent = false,
                overlaysPresent = false,
                i, obj;

            for (i in this._layers) {
                obj = this._layers[i];
                this._addItem(obj);
                overlaysPresent = overlaysPresent || obj.overlay;
                baseLayersPresent = baseLayersPresent || !obj.overlay;
            }

            this._separator.style.display = overlaysPresent && baseLayersPresent ? '' : 'none';
        },

        _onLayerChange: function (e) {
            var obj = this._layers[L.stamp(e.layer)];

            if (!obj) { return; }

            if (!this._handlingClick) {
                this._update();
            }

            var type = obj.overlay ?
                (e.type === 'layeradd' ? 'overlayadd' : 'overlayremove') :
                (e.type === 'layeradd' ? 'baselayerchange' : null);

            if (type) {
                this._map.fire(type, obj);
            }
        },

        // IE7 bugs out if you create a radio dynamically, so you have to do it this hacky way (see http://bit.ly/PqYLBe)
        _createRadioElement: function (name, checked) {

            var radioHtml = '<input type="radio" class="leaflet-control-layers-selector" name="' + name + '"';
            if (checked) {
                radioHtml += ' checked="checked"';
            }
            radioHtml += '/>';

            var radioFragment = document.createElement('div');
            radioFragment.innerHTML = radioHtml;

            return radioFragment.firstChild;
        },

        _addItem: function (obj) {
            var label = document.createElement('label'),
                input,
                checked = this._map.hasLayer(obj.layer);

            if (obj.overlay) {
                input = document.createElement('input');
                input.type = 'checkbox';
                input.className = 'leaflet-control-layers-selector';
                input.defaultChecked = checked;
            } else {
                input = this._createRadioElement('leaflet-base-layers', checked);
            }

            input.layerId = L.stamp(obj.layer);

            L.DomEvent.on(input, 'click', this._onInputClick, this);

            var name = document.createElement('span');
            name.innerHTML = ' ' + obj.name;

            label.appendChild(input);
            label.appendChild(name);

            var container = obj.overlay ? this._overlaysList : this._baseLayersList;
            container.appendChild(label);

            return label;
        },

        _onInputClick: function () {
            var i, input, obj,
                inputs = this._form.getElementsByTagName('input'),
                inputsLen = inputs.length;

            this._handlingClick = true;

            for (i = 0; i < inputsLen; i++) {
                input = inputs[i];
                obj = this._layers[input.layerId];

                if (input.checked && !this._map.hasLayer(obj.layer)) {
                    this._map.addLayer(obj.layer);

                } else if (!input.checked && this._map.hasLayer(obj.layer)) {
                    this._map.removeLayer(obj.layer);
                }
            }

            this._handlingClick = false;

            this._refocusOnMap();
        },

        _expand: function () {
            L.DomUtil.addClass(this._container, 'leaflet-control-layers-expanded');
        },

        _collapse: function () {
            this._container.className = this._container.className.replace(' leaflet-control-layers-expanded', '');
        }
    });

    L.control.layers = function (baseLayers, overlays, options) {
        return new L.Control.Layers(baseLayers, overlays, options);
    };


    /*
     * L.PosAnimation is used by Leaflet internally for pan animations.
     */

    L.PosAnimation = L.Class.extend({
        includes: L.Mixin.Events,

        run: function (el, newPos, duration, easeLinearity) { // (HTMLElement, Point[, Number, Number])
            this.stop();

            this._el = el;
            this._inProgress = true;
            this._newPos = newPos;

            this.fire('start');

            el.style[L.DomUtil.TRANSITION] = 'all ' + (duration || 0.25) +
                    's cubic-bezier(0,0,' + (easeLinearity || 0.5) + ',1)';

            L.DomEvent.on(el, L.DomUtil.TRANSITION_END, this._onTransitionEnd, this);
            L.DomUtil.setPosition(el, newPos);

            // toggle reflow, Chrome flickers for some reason if you don't do this
            L.Util.falseFn(el.offsetWidth);

            // there's no native way to track value updates of transitioned properties, so we imitate this
            this._stepTimer = setInterval(L.bind(this._onStep, this), 50);
        },

        stop: function () {
            if (!this._inProgress) { return; }

            // if we just removed the transition property, the element would jump to its final position,
            // so we need to make it stay at the current position

            L.DomUtil.setPosition(this._el, this._getPos());
            this._onTransitionEnd();
            L.Util.falseFn(this._el.offsetWidth); // force reflow in case we are about to start a new animation
        },

        _onStep: function () {
            var stepPos = this._getPos();
            if (!stepPos) {
                this._onTransitionEnd();
                return;
            }
            // jshint camelcase: false
            // make L.DomUtil.getPosition return intermediate position value during animation
            this._el._leaflet_pos = stepPos;

            this.fire('step');
        },

        // you can't easily get intermediate values of properties animated with CSS3 Transitions,
        // we need to parse computed style (in case of transform it returns matrix string)

        _transformRe: /([-+]?(?:\d*\.)?\d+)\D*, ([-+]?(?:\d*\.)?\d+)\D*\)/,

        _getPos: function () {
            var left, top, matches,
                el = this._el,
                style = window.getComputedStyle(el);

            if (L.Browser.any3d) {
                matches = style[L.DomUtil.TRANSFORM].match(this._transformRe);
                if (!matches) { return; }
                left = parseFloat(matches[1]);
                top = parseFloat(matches[2]);
            } else {
                left = parseFloat(style.left);
                top = parseFloat(style.top);
            }

            return new L.Point(left, top, true);
        },

        _onTransitionEnd: function () {
            L.DomEvent.off(this._el, L.DomUtil.TRANSITION_END, this._onTransitionEnd, this);

            if (!this._inProgress) { return; }
            this._inProgress = false;

            this._el.style[L.DomUtil.TRANSITION] = '';

            // jshint camelcase: false
            // make sure L.DomUtil.getPosition returns the final position value after animation
            this._el._leaflet_pos = this._newPos;

            clearInterval(this._stepTimer);

            this.fire('step').fire('end');
        }

    });


    /*
     * Extends L.Map to handle panning animations.
     */

    L.Map.include({

        setView: function (center, zoom, options) {

            zoom = zoom === undefined ? this._zoom : this._limitZoom(zoom);
            center = this._limitCenter(L.latLng(center), zoom, this.options.maxBounds);
            options = options || {};

            if (this._panAnim) {
                this._panAnim.stop();
            }

            if (this._loaded && !options.reset && options !== true) {

                if (options.animate !== undefined) {
                    options.zoom = L.extend({ animate: options.animate }, options.zoom);
                    options.pan = L.extend({ animate: options.animate }, options.pan);
                }

                // try animating pan or zoom
                var animated = (this._zoom !== zoom) ?
                    this._tryAnimatedZoom && this._tryAnimatedZoom(center, zoom, options.zoom) :
                    this._tryAnimatedPan(center, options.pan);

                if (animated) {
                    // prevent resize handler call, the view will refresh after animation anyway
                    clearTimeout(this._sizeTimer);
                    return this;
                }
            }

            // animation didn't start, just reset the map view
            this._resetView(center, zoom);

            return this;
        },

        panBy: function (offset, options) {
            offset = L.point(offset).round();
            options = options || {};

            if (!offset.x && !offset.y) {
                return this;
            }

            if (!this._panAnim) {
                this._panAnim = new L.PosAnimation();

                this._panAnim.on({
                    'step': this._onPanTransitionStep,
                    'end': this._onPanTransitionEnd
                }, this);
            }

            // don't fire movestart if animating inertia
            if (!options.noMoveStart) {
                this.fire('movestart');
            }

            // animate pan unless animate: false specified
            if (options.animate !== false) {
                L.DomUtil.addClass(this._mapPane, 'leaflet-pan-anim');

                var newPos = this._getMapPanePos().subtract(offset);
                this._panAnim.run(this._mapPane, newPos, options.duration || 0.25, options.easeLinearity);
            } else {
                this._rawPanBy(offset);
                this.fire('move').fire('moveend');
            }

            return this;
        },

        _onPanTransitionStep: function () {
            this.fire('move');
        },

        _onPanTransitionEnd: function () {
            L.DomUtil.removeClass(this._mapPane, 'leaflet-pan-anim');
            this.fire('moveend');
        },

        _tryAnimatedPan: function (center, options) {
            // difference between the new and current centers in pixels
            var offset = this._getCenterOffset(center)._floor();

            // don't animate too far unless animate: true specified in options
            if ((options && options.animate) !== true && !this.getSize().contains(offset)) { return false; }

            this.panBy(offset, options);

            return true;
        }
    });


    /*
     * L.PosAnimation fallback implementation that powers Leaflet pan animations
     * in browsers that don't support CSS3 Transitions.
     */

    L.PosAnimation = L.DomUtil.TRANSITION ? L.PosAnimation : L.PosAnimation.extend({

        run: function (el, newPos, duration, easeLinearity) { // (HTMLElement, Point[, Number, Number])
            this.stop();

            this._el = el;
            this._inProgress = true;
            this._duration = duration || 0.25;
            this._easeOutPower = 1 / Math.max(easeLinearity || 0.5, 0.2);

            this._startPos = L.DomUtil.getPosition(el);
            this._offset = newPos.subtract(this._startPos);
            this._startTime = +new Date();

            this.fire('start');

            this._animate();
        },

        stop: function () {
            if (!this._inProgress) { return; }

            this._step();
            this._complete();
        },

        _animate: function () {
            // animation loop
            this._animId = L.Util.requestAnimFrame(this._animate, this);
            this._step();
        },

        _step: function () {
            var elapsed = (+new Date()) - this._startTime,
                duration = this._duration * 1000;

            if (elapsed < duration) {
                this._runFrame(this._easeOut(elapsed / duration));
            } else {
                this._runFrame(1);
                this._complete();
            }
        },

        _runFrame: function (progress) {
            var pos = this._startPos.add(this._offset.multiplyBy(progress));
            L.DomUtil.setPosition(this._el, pos);

            this.fire('step');
        },

        _complete: function () {
            L.Util.cancelAnimFrame(this._animId);

            this._inProgress = false;
            this.fire('end');
        },

        _easeOut: function (t) {
            return 1 - Math.pow(1 - t, this._easeOutPower);
        }
    });


    /*
     * Extends L.Map to handle zoom animations.
     */

    L.Map.mergeOptions({
        zoomAnimation: true,
        zoomAnimationThreshold: 4
    });

    if (L.DomUtil.TRANSITION) {

        L.Map.addInitHook(function () {
            // don't animate on browsers without hardware-accelerated transitions or old Android/Opera
            this._zoomAnimated = this.options.zoomAnimation && L.DomUtil.TRANSITION &&
                    L.Browser.any3d && !L.Browser.android23 && !L.Browser.mobileOpera;

            // zoom transitions run with the same duration for all layers, so if one of transitionend events
            // happens after starting zoom animation (propagating to the map pane), we know that it ended globally
            if (this._zoomAnimated) {
                L.DomEvent.on(this._mapPane, L.DomUtil.TRANSITION_END, this._catchTransitionEnd, this);
            }
        });
    }

    L.Map.include(!L.DomUtil.TRANSITION ? {} : {

        _catchTransitionEnd: function (e) {
            if (this._animatingZoom && e.propertyName.indexOf('transform') >= 0) {
                this._onZoomTransitionEnd();
            }
        },

        _nothingToAnimate: function () {
            return !this._container.getElementsByClassName('leaflet-zoom-animated').length;
        },

        _tryAnimatedZoom: function (center, zoom, options) {

            if (this._animatingZoom) { return true; }

            options = options || {};

            // don't animate if disabled, not supported or zoom difference is too large
            if (!this._zoomAnimated || options.animate === false || this._nothingToAnimate() ||
                    Math.abs(zoom - this._zoom) > this.options.zoomAnimationThreshold) { return false; }

            // offset is the pixel coords of the zoom origin relative to the current center
            var scale = this.getZoomScale(zoom),
                offset = this._getCenterOffset(center)._divideBy(1 - 1 / scale),
                origin = this._getCenterLayerPoint()._add(offset);

            // don't animate if the zoom origin isn't within one screen from the current center, unless forced
            if (options.animate !== true && !this.getSize().contains(offset)) { return false; }

            this
                .fire('movestart')
                .fire('zoomstart');

            this._animateZoom(center, zoom, origin, scale, null, true);

            return true;
        },

        _animateZoom: function (center, zoom, origin, scale, delta, backwards, forTouchZoom) {

            if (!forTouchZoom) {
                this._animatingZoom = true;
            }

            // put transform transition on all layers with leaflet-zoom-animated class
            L.DomUtil.addClass(this._mapPane, 'leaflet-zoom-anim');

            // remember what center/zoom to set after animation
            this._animateToCenter = center;
            this._animateToZoom = zoom;

            // disable any dragging during animation
            if (L.Draggable) {
                L.Draggable._disabled = true;
            }

            L.Util.requestAnimFrame(function () {
                this.fire('zoomanim', {
                    center: center,
                    zoom: zoom,
                    origin: origin,
                    scale: scale,
                    delta: delta,
                    backwards: backwards
                });
            }, this);
        },

        _onZoomTransitionEnd: function () {

            this._animatingZoom = false;

            L.DomUtil.removeClass(this._mapPane, 'leaflet-zoom-anim');

            this._resetView(this._animateToCenter, this._animateToZoom, true, true);

            if (L.Draggable) {
                L.Draggable._disabled = false;
            }
        }
    });


    /*
        Zoom animation logic for L.TileLayer.
    */

    L.TileLayer.include({
        _animateZoom: function (e) {
            if (!this._animating) {
                this._animating = true;
                this._prepareBgBuffer();
            }

            var bg = this._bgBuffer,
                transform = L.DomUtil.TRANSFORM,
                initialTransform = e.delta ? L.DomUtil.getTranslateString(e.delta) : bg.style[transform],
                scaleStr = L.DomUtil.getScaleString(e.scale, e.origin);

            bg.style[transform] = e.backwards ?
                    scaleStr + ' ' + initialTransform :
                    initialTransform + ' ' + scaleStr;
        },

        _endZoomAnim: function () {
            var front = this._tileContainer,
                bg = this._bgBuffer;

            front.style.visibility = '';
            front.parentNode.appendChild(front); // Bring to fore

            // force reflow
            L.Util.falseFn(bg.offsetWidth);

            this._animating = false;
        },

        _clearBgBuffer: function () {
            var map = this._map;

            if (map && !map._animatingZoom && !map.touchZoom._zooming) {
                this._bgBuffer.innerHTML = '';
                this._bgBuffer.style[L.DomUtil.TRANSFORM] = '';
            }
        },

        _prepareBgBuffer: function () {

            var front = this._tileContainer,
                bg = this._bgBuffer;

            // if foreground layer doesn't have many tiles but bg layer does,
            // keep the existing bg layer and just zoom it some more

            var bgLoaded = this._getLoadedTilesPercentage(bg),
                frontLoaded = this._getLoadedTilesPercentage(front);

            if (bg && bgLoaded > 0.5 && frontLoaded < 0.5) {

                front.style.visibility = 'hidden';
                this._stopLoadingImages(front);
                return;
            }

            // prepare the buffer to become the front tile pane
            bg.style.visibility = 'hidden';
            bg.style[L.DomUtil.TRANSFORM] = '';

            // switch out the current layer to be the new bg layer (and vice-versa)
            this._tileContainer = bg;
            bg = this._bgBuffer = front;

            this._stopLoadingImages(bg);

            //prevent bg buffer from clearing right after zoom
            clearTimeout(this._clearBgBufferTimer);
        },

        _getLoadedTilesPercentage: function (container) {
            var tiles = container.getElementsByTagName('img'),
                i, len, count = 0;

            for (i = 0, len = tiles.length; i < len; i++) {
                if (tiles[i].complete) {
                    count++;
                }
            }
            return count / len;
        },

        // stops loading all tiles in the background layer
        _stopLoadingImages: function (container) {
            var tiles = Array.prototype.slice.call(container.getElementsByTagName('img')),
                i, len, tile;

            for (i = 0, len = tiles.length; i < len; i++) {
                tile = tiles[i];

                if (!tile.complete) {
                    tile.onload = L.Util.falseFn;
                    tile.onerror = L.Util.falseFn;
                    tile.src = L.Util.emptyImageUrl;

                    tile.parentNode.removeChild(tile);
                }
            }
        }
    });


    /*
     * Provides L.Map with convenient shortcuts for using browser geolocation features.
     */

    L.Map.include({
        _defaultLocateOptions: {
            watch: false,
            setView: false,
            maxZoom: Infinity,
            timeout: 10000,
            maximumAge: 0,
            enableHighAccuracy: false
        },

        locate: function (/*Object*/ options) {

            options = this._locateOptions = L.extend(this._defaultLocateOptions, options);

            if (!navigator.geolocation) {
                this._handleGeolocationError({
                    code: 0,
                    message: 'Geolocation not supported.'
                });
                return this;
            }

            var onResponse = L.bind(this._handleGeolocationResponse, this),
                onError = L.bind(this._handleGeolocationError, this);

            if (options.watch) {
                this._locationWatchId =
                        navigator.geolocation.watchPosition(onResponse, onError, options);
            } else {
                navigator.geolocation.getCurrentPosition(onResponse, onError, options);
            }
            return this;
        },

        stopLocate: function () {
            if (navigator.geolocation) {
                navigator.geolocation.clearWatch(this._locationWatchId);
            }
            if (this._locateOptions) {
                this._locateOptions.setView = false;
            }
            return this;
        },

        _handleGeolocationError: function (error) {
            var c = error.code,
                message = error.message ||
                        (c === 1 ? 'permission denied' :
                        (c === 2 ? 'position unavailable' : 'timeout'));

            if (this._locateOptions.setView && !this._loaded) {
                this.fitWorld();
            }

            this.fire('locationerror', {
                code: c,
                message: 'Geolocation error: ' + message + '.'
            });
        },

        _handleGeolocationResponse: function (pos) {
            var lat = pos.coords.latitude,
                lng = pos.coords.longitude,
                latlng = new L.LatLng(lat, lng),

                latAccuracy = 180 * pos.coords.accuracy / 40075017,
                lngAccuracy = latAccuracy / Math.cos(L.LatLng.DEG_TO_RAD * lat),

                bounds = L.latLngBounds(
                        [lat - latAccuracy, lng - lngAccuracy],
                        [lat + latAccuracy, lng + lngAccuracy]),

                options = this._locateOptions;

            if (options.setView) {
                var zoom = Math.min(this.getBoundsZoom(bounds), options.maxZoom);
                this.setView(latlng, zoom);
            }

            var data = {
                latlng: latlng,
                bounds: bounds,
                timestamp: pos.timestamp
            };

            for (var i in pos.coords) {
                if (typeof pos.coords[i] === 'number') {
                    data[i] = pos.coords[i];
                }
            }

            this.fire('locationfound', data);
        }
    });


}(window, document));